WhenChemicalsDie
Mukuro Ikusaba is a student at Hope's Peak Academy, with the name of the Ultimate Soldier. She has a good friend who she meets, Sayaka Maizono - the Ultimate Pop Star. Mukuro soon realizes she wants a little more from Sayaka, but she doesn't know what. The fear of her younger sister, Junko Enoshima, finding out she's attracted to girls is making her even more scared that her classmates (and her sister) would find out. Sayaka doesn't necessarily have the same attraction, having more of a crush on Makoto Naegi than anyone else, but Mukuro has a plan to seduce her crush..
(Smutty in some chapters)