Heart Stain

*"Let's date until we graduate."* Woohyun has a secret crush on his homeroom teacher. His best friend, Doha, finds out and confesses his feelings for him. But then he makes an interesting proposition: *"Go out with me. Fall for me before graduation, and I win. If you don't, you win."* Can Woohyun like someone other than his teacher? **Original Webtoon:** , , , **Official Translations:** English: Japanese: , , , , Others:.