In junior high school, Yumiko slashes the hand of a girl gossiping how she was the daughter of a mistress and was brought into her father's household only after her younger brother and family heir died. Yumiko's father wants her to assume her place as the heir to the Tohin Railway Group, and Yūji is ordered to act as Yumiko's bodyguard and then allow Yumiko to be abducted so as to scare her into returning home. However, Yūji decides to disobey orders and protects Yumiko. As they wait out a rain storm under a bridge, Yumiko reveals her past to Yūji. Angered by Yūji's defiance of his orders, Yumiko's father plans to have Yumiko study in America and orders the shut down of the school. Yumiko refuses to leave, prompting her father to come to the school to appeal to her in person. To his surprise, she opens fire on him with a gun and precipitates a standoff. When his men charge the building after her ammunition runs out she pulls the pin on a grenade and seemingly kills herself. However, Yūji had helped Yumiko fake her death. Yumiko is given a new identity including a falsified family registry and starts a new life as another student at the school.