Koyama-sensei, a cram school teacher, has a secret romantic relationship with his student Kazumi. However, when Koyama meets Kazumi's older sister Yoko again, their relationship becomes complicated and entangled. (Source: Shonengahosha, translated)

The manga revolves around Baku Ōmura, a hot-blooded young man who attends the private Yagisawa High School. He hates people who break the rules, and as he takes on many of his schoolmates and adults in various games of gambling, he sees through cheating with his wit and skill. [ANN]

A ramen shop owner with business going bad is meeting his former friend who's a yakuza now.