Circa 1937. A Japanese soldier in Manchuria meddling in the opium trade.

The fourth year of the Meiji Era. Yukinosuke, the son of a family of the privileged aristocratic class, goes about his life covering up a worry he has, being “I have not once had an erection”. In the midst of such troubled days, he meets Sayo, the head of a family of executioners spanning back into the Edo period. After witnessing a beheading performed by her, something pitch black starts to well up inside Yukinosuke!! Sprouting from lust begins a noble romance of blood and nature!!

Gamble is life. The dice of destiny will change the world!

Masashi Kitazawa, a sophomore in high school, had a trauma. The trauma is that I was fat when I was a child!Kitazawa, who diligently dieted and worked hard in middle school, grew up to be a handsome man and was supposed to lead a peaceful school life, but... In the new semester of high school, handsome men and beautiful girls have gathered in Kitazawa's 2nd year class A for some reason. What's more, he received a secret invitation from Ayame Yagyu, the most beautiful girl in her grade...!?