One day homeroom. A large amount of erotic goods that come out of everyone's bag at the inspection of belongings. An erotic video suddenly appears on the TV in the classroom. "Is this the work of Ero Ero-sama!?" It seems to be rumored in the streets, "Going Around Teaching Octogenarian Students the Goodness of Eroticism" God... spirit... youkai... something like that?

For the time being, homeroom teacher Hinano told me, Manami, the chairman of the committee, ends up organizing the erotic goods by herself.

"Oh wow! Hey Manami-chan, do you know what this is used for~~?"

Manami loses her mind unnoticed while working silently and frustratingly while driving away the rotten Anri who is curious about erotic goods and makes a mess. The next day, when I questioned the boys who were somehow strange, all the boys had a video of Manami masturbating with yesterday's erotic goods.

"If you masturbate to this movie..., tell me how many times you came tomorrow..."

Manami in the video smiling lasciviously.

"No, no, no ... I don't know this stuff ... not me ... , I don't know ......!"

Manami is frozen, so Anri goes around deleting videos of boys, but one boy refuses and runs away... I thought, She is swallowed up in the darkness that suddenly appears.

"Disappeared? Eaten?"

While the classroom panics, the erotic video is reflected on the TV in the classroom again. Her homeroom teacher Hinano sees it and remembers her sealed memory.

"I remember... I... experienced a similar incident when I was a student..." "To put it simply... this class has been cursed...!" "We have to make it a class where everyone does naughty things every day...!"

If you escape without permission, you will be swallowed by the darkness and trapped in the space of 〇〇. Everyone in the class had no choice but to obey. The boys are a little happy, but...

“You guys… are you enjoying this situation?!”

Manami's screams were in vain, and a lewd school life began.