My childhood friend Mitsuki, after graduating from elementary school and entering junior high, quickly learned about sex. Or rather, she made sex a regular part of her life. She slept with her own father and brother, who was four years older than her, and had sex with many different men following to the rules she had set for herself. Of course, I, Mankey, who was a virgin who hasn't even hit puberty, heard that and said, ``What the hell?'' This is the wild coming-of-age story about Mitsuki, who has excellent grades and good looks and sleeps with whoever she wants, and her childhood friend Mankey, a virgin.

"I don't have sex without love."
"Don't treat virginity as a principle"

A story of pure love, dedicated to all men who were once virgins.

(Kadokawa, translated)