[DeepL Translation - needs review] Volume 1 Introduction: Ayumi Sakura, in the midst of her sensitive adolescence, is isolated, unable to get along with her parents or friends.
The only person she allows herself to befriend is a bad-looking "uncle" with a mustache and a black shirt.
One night, Ayumi makes a proposal to him.
"Uncle, will you teach me something bad?
But what he teaches her is a "taste for adults"...
But what he teaches her is something "super dangerous" that goes beyond Ayumi'...
