DASD-981 Aphrodisiac Pervert Train Student Unable to Satisfy Female Teacher's Excessive Lust

The teacher in charge, Mr. Natsuki, is an annoying teacher who always picks fights. One day, I witnessed him being sexually assaulted on a train and he didn't seem to be resisting it. I recorded the scene with my phone and showed the video to Mr. Natsuki the next day, blackmailing him into drinking aphrodisiac. Then, I half-forcibly raped him, and he started to enjoy it. With the combined effects of public humiliation and the aphrodisiac, I thoroughly defiled him...