Ichinene

Ichinene is the femslash ship between Ichika Hoshino and Nene Kusanagi from the Project SEKAI fandom.

Canon
Ichika and Nene are both first-year high school students as well as friends. While Nene attends Kamiyama High School, Ichika goes to Miyamasuzaka Girls Academy. They share a great passion in music, as Nene has always loved musicals and dreams of starring in big productions, and aside from being Leo/need's vocalist, Ichika has loved Hatsune Miku's songs and sung them ever since she was young. Coincidentally, Ichika's name means "one song" and Nene's name means "peaceful, tranquil."

Their biggest interactions happened in the Musical Parade Twilight event, where Tsukasa invites the Leo/Need members to take a break by coming over to have fun at Phoenix Wonderland and watch one of Wonderlands x Showtime's shows. After Leo/need's band practice, Ichika is walking home while wondering how she could improve like Shiho. Upon hearing Nene sing at the park, Ichika is left in a stunned state, thinking how good Nene sounds and how she wishes she could sing like Nene. When Ichika tries calling out to her, Nene runs off in panic and Ichika is left alone. The scene ends with Ichika telling herself that she hopes she'll see Nene again.

When Tsukasa tries introducing his troupe members to the Leo/need members, he is shocked to find out they all know Emu, as she attends the same school. Meanwhile Ichika notices Nene and thinks she should ask her for tips on singing. Ichika greets her and Nene hides behind Tsukasa out of shyness. The two groups then agree to visit attractions together. While heading towards the Dreamland, as the groups talk about their memories of Phoenix Wonderland, Nene and Rui mention their fondest memories of the park come from their performances, and Ichika suggests that they all should make memories together.

In the final chapter of the event, Ichika claims she left something at the Wonder Stage and goes back to talk to Nene. Nene is surprised to see her again, and Ichika mentions how she isn't doing as well as she wants to, and that she wants to get better for everyone's sake. Ichika then praises Nene's singing, telling her she was touched upon hearing her and then asks if Nene could teach her. Nene is moved about the revelation, and after a small moment of hesitation, she agrees to Ichika's request and tells her not to be so formal and stiff around as they're the same age. After Ichika leaves, Nene feels nervous again but Rin assures she'll be fine.

In Rui's event 2* second card episode, Wonderlands x Showtime is about to rehearse in the Wonderland SEKAI, before Rui asks why she's sighing so heavily. When Nene mentions Ichika, Emu asks if they're friends now, and Nene mentions she forgot to exchange contact info with her. When Tsukasa mentions Ichika most likely didn't remember to ask because she's not as outgoing as well and how tragic it would be if their friendship ended there, Emu exclaims she'll talk to Ichika next day. Nene stops her, saying it's sort of her fault so she'll make sure to do things right, before Rui assures her that Ichika will most likely reach out to Nene sooner or later as she's the one who asked for Nene's help. Rin calls out to Nene who leaves the scene, and Rui suggests to the other two that they should cancel their rehearsal tomorrow so Ichika and Nene can meet. Next day after school, Rui chuckles while mentioning he hadn't expected Rin to suggest her to go and talk with Ichika. Rui, Tsukasa and Emu then secretly watch the events unfold while smiling, and Rui especially thinks how happy he is for Nene.

Quotes
"(Her voice is so delicate and gentle... She knows exactly how to express herself through song. I really wish I could sing like that too...)"

- Ichika in Musical Twilight Parade Chapter 6 - A Song to Help You Smile

"Rui-kun! Tsukasa-kun! Let's do this! Operation Securing Nene-chan & Ichika-chan's Friendship!"

- Emu in "Beastly Madness" second side story

"Hoshino-san, Happy Birthday. I'm glad that I could celebrate your birthday together with everyone. Let's both do our best from now on too."

- Nene's Birthday Line for Ichika (2022)

Fanon
Ichinene is somewhat of a rarepair at the moment, in both the Western and Eastern fandoms. It sailed as a result of their interactions and how interested the normally cool Ichika was in Nene during Musical Parade Twilight. The ship gained a bit of boost in popularity in 2022 after Nene's Valentine's dialogue, where she mentioned she wanted to give Valentine's chocolate to Ichika but not knowing the proper way to do it due to her shyness.

Fandom
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Trivia

 * Their ship is referred to with the "🎸🤖" emojis.
 * Their Kizuna Rank titles are: "Vocalist and Diva", "Teacher and Disciple", and "Don't Be Afraid, Be Yourself".