Rinkan Club

Higashigakure is a city located among the mountains. For many centuries, there has been a tradition here associated with the rite of appeasing the deity.

According to this tradition, men gather together to have an intimate relationship with a woman who has been chosen to participate in the ceremony. The purpose of this action is to appease the deity. If a woman becomes pregnant, it is believed that the deity will be pacified and bless the village, which will lead to a good harvest and peace. If pregnancy does not occur, the woman is doused with salt soaked in semen, after which she is thrown alive into the river as a sacrifice to God.

Although this custom exists to this day, the ceremony remains a mystery. It continues to be conducted by a group of a secret club that actively participates in the life of the unique school in the city.

Motoko Tamura becomes the leader of this group, known as the sex club, and begins her work.