Mai X Mikoto. Natsuki X tentacles

Natsuki is hunting orphans (Mai-HiME's name for the monsters) to avenge her mother's death when she unwittingly wanders into an orphan nest ... (it's hentai so big surprise the orphans have tentacles)

Mai does casual sex with some guy.

Hentai Orphan stole Natsuki’s panties collection… what’s left is one very short bloomer.

student council member has her secret to stress relief Features: Anal.

Ch.1 - Mai's Secret Ch.2 - Natsuki's SecretCh.3 - Midori's SecretCh.4 - Arika Wa Do My...Ch.5 - Eventually, It All Turns To Fluff

Arika is in an otaku's home at night and is naively ready for "fun"

Shizuru x Arika Shizuru x Natsuki