I believed that my fiance was holding me...

Nanaho is a female teacher who lives a happy life with her three months ahead of her marriage to Kazuo, a teacher at the same school. One day, she was having sex with a guy who wanted to have sex with him...but it was supposed to be a DQN student's asshole cock. He is threatened with compensated dating as a joke, and offers Nanaho to the DQNs and the others, and their lover's sex suddenly turns into a gang-rape hell... Nanaho is played with gangbang play, called a dick-stricken game, and even though she doesn't want to cum, her body repeatedly reaches orgasm, and her reason eventually collapses...