In line with the manga by Aura Seiji.

Oahu is the sultry Maria's first day teaching as of this new school. The headmaster graciously shows her to the classroom where Maria is shocked to find out other faculty members engaged in a steamy orgy with students. Before she has a chance to leave, an alluring female teacher forces a strong aphrodisiac into her mouth having a kiss, which renders Maria helpless and forced to get acquainted with the orgy. Later that night she discovers to her surprise that this events that happened at school actually turn her on... Will she quit her job or return back for further?