Ryuu Kuroda just wants to survive high school, read fluffy shoujo manga, and grind his daily gacha quests in peace. Unfortunately, his crippling social anxiety, raspy voice, and terrifying "Resting Murder Face" have convinced the student body that he is a ruthless Yakuza boss. Every panicked stutter is interpreted as a death threat; every clumsy stumble is seen as a masterful martial arts stance.

Enter Reina Arisugawa, the flawless and intense Disciplinary Committee President. Unafraid of the rumors, she sees Ryuu awkwardly feeding kittens and assumes he’s an honorable mob boss. Determined to save his "noble soul" from a life of crime, she launches her ultimate reform plan: forcing him into a marriage contract!

Now Ryuu is tied down in a scary fake engagement. With gangs bowing to him by mistake and a fiancée who turns regular dates into tactical missions, can this anxious nerd make it through high school without accidentally conquering the city's criminal underworld?