When an ultra-elite high school enforces a strict "No Romance" rule that expels anyone caught dating, a student secretly helps her classmates for cash.

Masajiro Miyazawa owns and runs a pawn shop for generations. His first son is Kenji and his daughter is Toshi Miyazawa. Kenji is supposed to take over the pawn shop as the first son, but he refuses. Masajiro is soft on his son. Meanwhile, Toshi is smart and wise. She gives advice to her father and her older brother. One day, Toshi gets sick.