Nenekasa

Nenekasa is the het ship between Tsukasa Tenma and Nene Kusanagi from the Project SEKAI fandom.

Canon
Tsukasa and Nene are both part of Wonderlands x Showtime. They also both attend Kamiyama High School, with Tsukasa being a year above Nene. The two are often seen interacting with one another. Nene often is cold to Tsukasa, but is kind towards him too. The two are opposites of each other, as Tsukasa is a loud-mouth and outgoing person whereas Nene is more reserved and tends to stay quiet most of the time due to her shyness. Tsukasa calls her the troupe's diva while as Nene calls him an idiot who is headed for stardom. Nene deeply cares about him despite insulting him and the two are the most responsible in the unit, sharing a kizuna/trust rank called "Legal Guardian's Association".

In the area conversation, "Tsukasa's Existence", Tsukasa mentions how Nene and Touya were in the same class together. He boasts about how Touya looks up to him and that he has given him countless life advice. Nene notes that it was a bad example from which one can learn. Tsukasa gets offended and tells Rui and Nene that would realize his value someday and would be grateful for his existence.

Main Story
The two are first seen interacting in the 7th episode of the Wonderlands x Showtime, but not as much as they do in later episodes. Tsukasa boldly states that he needs a person who can do a show, not a robot to which Nene replies, asking if he has a problem with it. After giving the Nenerobo a name, Tsukasa decides to say a few words to Nene. He tells her that they would be singing and dancing at the high quality that's worthy of being a star (himself). He says that the robot cannot dance unfortunately, which Nene insults him and says his eyes are at the back of his head. Nene shows him that Nenerobo can indeed dance and perform despite being a robot. Tsukasa doesn't believe it at first, with Nene then proving him wrong and controlling the robot to dance which surprises Tsukasa since Nenerobo could tap dance with such short legs. Tsukasa believes that it is not something you can do with that kind of body proportion, but Nene continues to show off to Tsukasa anyway to prove her point. Nene proves her point with dancing and Tsukasa still cannot believe it, stating that she must be able to sing too. Nene sings, Tsukasa being amazed before making the assumption that she better not be playing the tape of some professional singer. Tsukasa worries that Nene may get more attention than he will, with Nene mentioning the fact that he doesn't have to include her if he's so worried about not standing out. He claims that he has no fears, with Nenerobo getting closer to him with a questionable "hmmmmm?". He asks if she has something to say and she says that she does, saying that it was good for him that he had noticed. Rui giggles and points out that the two were getting along well. He finally accepts that Nene had good quality and was good enough to be on the stage, declaring her to be the fourth member. Tsukasa says that Nene should appreciate his generosity, Nene jokingly threatening him that she would target him with her laser beam.

In episode 8, Tsukasa brings a script. Rui is amazed that he wrote a script, while Nene is sarcastic towards this and asks if the script would show them his intelligence level. Tsukasa scoffs and points out that she keeps poking at him like that, then claiming that the script was too refined for Nene's understanding and that he wouldn't be explaining it to her. Nene throws it back, saying that his explanation would make it more confusing. Emu points out that the two were great friends now, with Rui agreeing that they were talking on the same level as each other. Tsukasa suggests aname for the troupe, being "Team Pegasus In The Sky!!" with Nene insulting it, calling it lame. He retorts, asking what other marvelous name there could be. Rui agrees with Nene, saying that it is pure lame.

In episode 9, Tsukasa is winded from practicing. Nene admits that she assumed that he was all talk but was impressed by how good his acting and dancing was. Then, Tsukasa states how harsh Rui is with Nene asking if he's hit a wall as she calls him Mr. Star. He yells, saying he, of course, has not hit a wall but does want a hint.

In episode 10, when they enter the SEKAI, Rui has captured a plushie that Tsukasa saw the other day and says that it was staying right there in SEKAI, not to the real world. Nene asks what he's going to do with more weird stuff like that, Tsukasa agreeing afterwards saying that she was right for once.

In episode 11, Tsukasa keeps on blabbering about how he will be a star and how he was ready for the road of stardom, Nene being annoyed by this and making a comment, asking if he ever got sick of talking about being a star. Tsukasa tells her that she can say what she wants, but he was feeling confident. He thanks Rui, Emu and Nene for being able to keep up and doing a great job despite "not amounting to his level of greatness". Nene states that she never recalls keeping up with him, but hopes that everyone would enjoy the show tomorrow too. He continues to boast, Nene saying that he's getting carried away again but Rui says to leave him be.

Later in episode 11, they're about to be prepared for the show. Nene seems nervous and Tsukasa notices, asking if she was nervous since she had been quiet. She tries to deny it, but Tsukasa reassures her and says that everyone would be paying attention to him so she shouldn't waste her time on being tense since she was just "a weird robot". She's about to say "He's such a.." but gets cut off by Rui, who says that Tsukasa may be encouraging Nene in his own way while Nene says that he is just being airheaded.

In episode 12, the two are acting together as "Prince Pegasus" and "Ne-Neh" the robbit. "Pegasus" asks if "Ne-Neh" would lend him a hand, to which she responds that he had slayed all the evil monsters and so the village was safe. She offers "Pegasus" a thank you hyper drink which will give him energy. He ends up drinking oil, to which the audience laughs. "Pegasus" plans on singing a song after the dragon comes, but "Ne-Neh" says that she can handle it and put the dragon to sleep. She starts singing, to which "Pegasus" is amazed by her singing and how the dragon was getting drowsy. However, the microphone gets muted and Nenerobo starts to shut down. Tsukasa believes it is breaking down and attempts to buy some time, acting like it is apart of the performance, saying that the audience should cheer on "Ne-Neh" to put the dragon to sleep. Nenerobo crashes and lands on Tsukasa. The show ends suddenly.

In episode 13, Tsukasa finally learns who Nene is. Nene remains quiet, while Emu tries to encourage her to not feel so down. Tsukasa gets upset, learning the reason (being that Nene forgot to charge the battery) as to why the show had been a failure. Nene apologizes, Tsukasa yelling at her and saying that apologizing wouldn't do anything at all. Rui attempts to tell Tsukasa that Nene had no ill intentions of sabotaging the show as Tsukasa once again yells, asking about today's audience and being absolutely furious at the statement of "next time". He continues to shout about how they all wanted a successful show. Nene blames herself for the show's failure and tells herself how she could've done the show if she could show herself without using a robot. Tsukasa agrees, saying something was wrong from the start and that she shouldn't have used a robot to hide and talk without showing herself. He continues to yell at her, telling her to be quiet for being shy and not being able to stand in front of people, also telling her that she should be able to stand in front of her audience. Nene apologizes again and runs off, seeming as Tsukasa is slowly regretting his actions.

In episode 15-16, Tsukasa and Emu find Nene at the stage singing. Nene starts sweating nervously before shouting out that she was sorry and escapes on Nenerobo. Emu and Tsukasa are surprised by this, Tsukasa telling Emu to run and chase after her. Nene continues to run away as Tsukasa and Emu continue to chase after her. Later, Tsukasa is calling out Nene's name to which Nene panics, realizing that the duo hadn't given up on finding her just yet. The duo finally catches Nene. She looks away from Emu, Tsukasa calling out Nene's name once more. Tsukasa is about to apologize, but Nene doesn't want to look at Tsukasa and he realizes that, saying that he said such horrible things and of course she didn't want to look at him. He tells her that she could stay right in place but he wanted to apologize for yesterday. Nene stays silent as Tsukasa continues on, saying he had been frustrated but should've known it was more frustrating for her that the show didn't go too well. He says that he wasn't focused on her feelings or everyone else's feelings and that he was extremely sorry. Nene continues to listen to what Tsukasa has to say. Tsukasa tells Nene that he wants to make a show that makes the audience smile, that seeing the audience would also make them (as in the whole troupe) smile too. That was the kind of amazing show that Tsukasa says he wants to put on. He asks Nene if he could do a show with her again. She seems hesitant at first, but agrees that she wants to do a show too. He's glad that Nene wants to do shows again and she tells Tsukasa how musical shows were always her dream. She talks about how she was the lead for a junior high casting but the performance hadn't gone well because she wasn't able to say her next line. This shows that the mess up in the show they had done the other day reminded her of that day in junior high. She tells Tsukasa that she agrees that she can't do a great show without facing the audience but she starts to tear up. Tsukasa tells her a quote about never failing if you don't do anything at all which is a quote from a star that he respects. He tells Nene that failure will always come to someone who is taking on a challenge but because they make progress like that, they get closer to creating the greatest show. He admits to Nene that he was wrong and asks her one more time to do a show with her, no matter what. She smiles softly and says she always wants to do a show too, her cheeks turning light red. She asks for Tsukasa to let her join to which he responds that they should both work together.

In episode 19, Nene says that the audience size was half of what it was last time. She says that she'll do her best and Tsukasa tells her that him and the others would be there to back her up incase anything had happened. He encourages Nene to give her all, to which Nene is shocked and says okay.

In episode 20, Tsukasa asks Nene and Rui what they were going to do. Nene tells him that she wanted to stand on stage some more and someday become a professional actress.

More info is to be added soon.

Quotes
"So... please let me join... you."

- Nene in Episode 16 of the main story

"Yes! Let us work together, Nene!"

- Tsukasa in Episode 16 of the main story

"Nene, Happy Birthday! Come now, let's go to the Sekai and have a great party together with everyone!"

- Tsukasa's Line for Nene's birthday (2022)

Fanon
Nenekasa doesn't get much recognition. What does not help its unpopularity is that some consider their dynamic toxic, with Nene constantly teasing and acting sarcastic against Tsukasa, and how some can't get over Tsukasa yelling at Nene during their unit's Main Story (when he has gotten over and developed as a character after this). It is overshadowed by more popular ships like RuiKasa and Emunene. Nenekasa is normally shipped alongside Ruiemu. However, some fans like to ship all of the ships in one polyamorous relationship, Polyshow.

There also had been a Nenekasa week on Twitter from September 26-October 2, using the. Themes were "song, practice, star" for the first day, "games, offstage, #1" for the second day, "comfort, show, trust" for the third day, "growth, adlib, pride" for the fourth day, "fond, finale, realization" for the fifth day, "future, curtain call, promise" for the sixth day, and "AU, encore, free day" for the seventh and final day.

Fandom
FAN FICTION

PIXIV

TWITTER

Trivia

 * Their ship is referred to with the "🌟🤖" emojis.
 * Their Kizuna Rank titles are: "Future Star", "Legal Guardian's Association" and "Somewhat Trustworthy".
 * Tsukasa is much taller than Nene, standing at 172 cm (5'7") while Nene is 156 cm (5'2") which makes a 16 centimeter/5 inch height difference.
 * Tsukasa has more brighter colors, as Nene has more duller colors which could correspond to why they seem to match well together.

Variations

 * Emunenekasa refers to the ship between the two and Emu Ootori
 * Polyshow refers to the ship between the two, Emu Ootori and Rui Kamishiro
 * Ruinenekasa refers to the ship between the two and Rui Kamishiro