Kaguya-sama: Love Is War/Ships

Ishiragi
 Ishiragi is the het ship between Yuu Ishigami and Kobachi Osaragi. AKA: IshiKoba, KobaYuu, Osagami

Canon
Yuu Ishigami and Kobachi Osaragi have a positive relationship, though they aren't really close as friends. In the "End of Secrets" arc, it has been revealed that Osaragi may have been attracted to Ishigami all this time due to a few good deeds he did for her and Iino with a purely selfless mindset. She is seen supporting Ishigami several times over the course of the manga in the background, which holds especially true now, as she goes out of her way to push Tsubame and Ishigami closer, for the sake of the latter's happiness. She is even willing to put it above her closest friend - Iino's own happiness. On Valentine's Day, she's one of several girls who give Ishigami a chocolate, with hers being thanks for the good deeds he's done.

Considering the themes of the second half of the 'Ends of Secrets' arc, it is implied Osaragi's 'liking' of Ishigami is not romantic in a sense, but very well could have become, if she had not misunderstood his gestre in Middle School towards Iino(i.e. him giving the sutera flower).

Fanon
The ship managed to quickly gather popularity after a misguidance by the person who leaked the chapter which supposedly confirmed Osaragi's romantic feelings for Ishigami. Even after the misunderstandings were cleared up and people accepted the fact that Ishiragi would never be canon, that didn't stop some from simply shipping them for fun. As a joke, a lot of people now refer to Osaragi as a 'simp', because of her devotion towards Ishigami's emotional well-being.

Ishigami and Osaragi are known to have quite a bit in common, which is another factor that fueled the ship. Both were hated by the girls in their classes, both have great pop-culture knowledge and both tend to keep their thoughts to themselves.

As a result of the ship being teased late into the story, only manga readers are aware of it. However, since Osaragi has already been introduced in the anime adaptation and shown to have a knowledge of Ishigami's good side, the ship isn't completely unfamiliar to the fans who have only watched the anime, although this is only the case for those who ship rare pairs. Its main ship rivals are IshiMiko and Ishibame.

Fandom
FAN FICTION
 * A Ishigami x Osaragi story on fanfiction.net

WIKIS
 * on