APNS-328 Kisaki Nana Trapped in Debt Hell by Half-Brother

Kisaki Nana, a university student raised by a busy father, dates Yoshida, an older part-time worker who becomes her boyfriend and father figure. Their future looks bright until Saji, Yoshida's half-brother, arrives carrying debt and sets his sights on Nana. What follows is a descent into coercion and exploitation, involving group sex and other degrading acts, as the siblings' troubles entangle her.