In the Hall Where Lifespans Are Sold - Episode 6

Marisa confronts Issac and demands he sign a blood pact that would transfer his lifespan to Scott, who has been hurting himself over the piano. Issac feels betrayed—she once vowed to marry him but now chooses Scott. Marisa insists the sacrifice will help Scott and redeem Issac before their parents, invoking a vow from five years ago. Arguments escalate as Issac accuses her of always putting Scott first. In a final, bitter move Issac signs the pact to settle the old debt. The episode ends with their bond severed and the trio's future left uncertain.