Sister in School Uniform

The school you attend turns into a brothel late at night...?! You accidentally obtain a membership card and enter the school late at night out of curiosity, where you find a junior, senior and teacher waiting for you. Now that you've seen their other sides, who will you choose for this thrilling night?

Bad girl Sayaka Saitou and honor student Mio Shimizu couldn't be more different, but they're best friends.
One day the two of them are sucked into a nightmarish, monster-infested version of their school,
and have to work together to escape. Will they make it out in one piece...?

Two sisters started living in my house for one simple reason: it was close to their school.
But each of them had their own hidden agenda.

"Big bro, please always keep at least 100 meters between you and Mikaru-nee!"
"Michiru, you’re the one who should stay away from Yuuhi-nii-san!"

Ah… my daily life is already a complete mess.
And just like that, my chaotic, nostalgic, and lively days with them began.

Your lazy sister is spending her money on new things.
Where is she even getting this money from?

You play as the Demon of Lust, disguised as a charming preacher who infiltrates a remote monastery with one simple mission: corrupt the holiest place in the region from the inside.
What starts as an easy task quickly turns into a game of psychology, manipulation, and control — because the nuns are far from innocent.

Each sister has her own personality, secrets, boundaries, and forbidden fantasies. By carefully managing daily schedules, making the right choices, and interacting with visitors, you guide them on a journey from strict devotion to forbidden self-discovery.