Childhood friend of Yukinaru Satou. Although she "dresses like a slut" according to Yukinaru, she claims to be a pure girl and her style is simply meant to be rebelious. There is a running gag which happens nearly every chapter where her top ends up pulled down publicly.
Adamas Witches
Yukinari discovers that he has a condition known as Adamas Syndrome, which allows him to ejaculate rose diamonds worth 5 million yen. One side effect is that each ejaculation causes him to lose 1 year of lifespan. A group of seductress women called "witches" are now seeking his semen to get rich.
