Kim Sang-an is a loan shark who infiltrates the classroom of the students who bullied his younger sister to death, posing as their new homeroom teacher. He is not there to educate them. He is there to collect. Written by Black and White, illustrated by Kim Dong Chan, serialized on Naver Webtoon. Contains graphic violence, gore and themes of suicide. Ongoing.

Read Debtbound by Blood manhwa in English, updated regularly. Also known as: 사채지간 · Sachaejigan · The Devil's Classroom · A Private Debt · Loan Shark Ties · Private Debtors