Kasuhagu

 is the femslash ship between Kasumi Toyama and Hagumi Kitazawa from the BanG Dream! fandom.

Canon
Kasumi and Hagumi are childhood friends (although they don't remember this until later on) and fellow high school students at Hanasakigawa Girls' High School; the two were also classmates in their first year of high school. They call each other with nicknames "Kaa-kun" and "Hagu". Kasumi is Poppin'Party's vocalist and rhythm guitarist, while Hagumi is Hello, Happy World!'s bassist. They are both optimistic, friendly, and tend to fall for the weirdest explanations and have a wild imagination.

A Fair and Fluffy Competition
In Chapter 2, after the mascot characters' long jump competition, Kasumi hands Hagumi a towel. After Hagumi thinks back on her telling Misaki to not hold back during the competition, Kasumi tells Hagumi she wants her to be the best Marie she can be, even if her costume doesn't look the greatest and that she, Tae and Arisa are ready to help her in any way possible. Hagumi then explains why she's competing as Marie after Kasumi asks her. In Chapter 3, the mascots perform in ballroom dancing, and Kasumi dances with Hagumi. The two fail to dance properly, with them stepping on each others' feet and being unable to land their steps properly. Tae comments that they look like they're having fun, and the baffled Arisa mentions spectators must be entertained over how out of sync they are. Despite this they are ranked two in the category and both cheer on. During the ending Chapter, after the marathon and Michelle and Marie scoring first place together, Kasumi suggest Marie should have her own theme song.

In Hagumi's Card Story Episode, titled "Secret Meeting", Kasumi, Hagumi, Arisa and Tae are sitting in Arisa's basement, where they are holding a meeting for the "Make Marie Andromeda a Super Popular Mascot Committee" (as titled by Kasumi). Hagumi offers the girls some croquettes, and although Kasumi gets excited, Arisa instantly reminds her that they have a meeting to do. Kasumi then asks whether Hagumi is determined enough to do it, even if it means she has to face against Michelle, and Hagumi assures she's going to give her a fair fight. The group then proceeds to come up with a strategy and Kasumi and Hagumi agree she should act like a rabbit by jumping and leaping around and moving around in the same manner. Hagumi suggest she should also do some backflips, and when Arisa shoots down her idea, Kasumi asks if she can do it, and Hagumi assures she can. After a moment of brainstorming, Hagumi thanks everyone for their time and they proceed to huddle up.

Sundays at a Distant Park
The event focuses on Hagumi and Kasumi reminiscing their childhood as they are on a quest to search for the park they used to play in. It is also revealed that Hagumi used to refer to Kasumi as "Kasumi-chan", and Kasumi used the nickname "Haa-chan" for the former, and one of the reasons why Hagumi couldn't recognize Kasumi before she introduced herself was because Kasumi used to have twin tails instead of her signature star buns.

SPARKLE! SUMMER DIVE
Kasumi makes an appearance in Hagumi's Card Story's first Episode titled, "I Can't Do Cute!". During recess, Kasumi asks what kind of a swimsuit Hagumi is going to wear during her beach trip, and she says she'll wear the one she uses at school. Kasumi is shocked and tells her she should buy a new one for the occassion. Hagumi retaliates and says that looking for a new swimsuit is embarrassing, before Kasumi suggests they go shopping together after school. At the swimsuit store, Kasumi suggests Hagumi try out different swimsuits, but Hagumi is sad and says she has no sense for it at all. Kasumi then suggests a frilly swimsuit and one with a ribbon, while Hagumi insists that she'll look silly while wearing cute things. Kasumi compliments and encourages Hagumi, who then thanks the former and hops into the dressing room. Ten minutes later, Hagumi shows her bikini to Kasumi, who then calls Hagumi "the cutest thing ever", how she wants to ""hug you [Hagumi] till you pop" and insists she doesn't look weird at all, that everyone else will also like it. Hagumi decides to buy the bikini and thanks Kasumi tremendously. The story ends with Kasumi telling Hagumi to have some fun during the beach trip and Hagumi gushes over imagining how everyone else reacts to her bikini.

Quotes
"Don't be so hard on yourself! It'll look great on you! You're actually really adorable, I'll have you know! Whether it's cutesy or if it's got a mature vibe, either way, you'll make it work!"

- Kasumi to Hagumi in "I Can't Do Cute!"

Fanon
Kasuhagu is a rarepair. The biggest and most glaring reason for this is because it is a Hagumi ship (who is overall one of the least popular characters) and Kasumi has a handful of other popular ships such as Kasuari and Kasuyuki. Fans of the ship enjoy their "reunited childhood friends" trope, as well as the fact that the two are on the same wavelength and tend to come up with crazy ideas. Sometimes the Western side of the fandom likes joking around that Kasumi and Hagumi are "two dumbasses sharing one braincell".

Fandom
FAN FICTION