Shinen naru Renai Tetsugaku

Philosophy grad student Tomi has a secret crush on the notoriously sadistic Professor Takatsuki. After he rescues her from a drunk student at a party, she assumes she's dreaming and lets herself be vulnerable—until he suddenly kisses her. Waking up in his bed the next morning, she panics, but Takatsuki smirks coldly and proposes: "Marry me.