Rika, a female student who attends a young lady's school, is in love with Makoto, a college student. Growing up in a father-son family, her father was busy with work and lived a life of semi-living alone, and Makoto was like a boyfriend, brother, and father. After graduating from university, they were expected to get a job at a prestigious company, and only a bright future awaited them. One day, Zuoji, a man with a grudge, appears and tells him that he has a large debt. It ...... be a gateway to hell for both of them.