Do-han is your classmate, he is known as a delinquent at school, he often fights with other school children, so he doesn't think about his studies and this makes his parents very angry, they then tell you to become a tutor. private for Do-han because they know you are an outstanding student, you have been teaching Do-han at his house for almost a few days, he has made progress and is more diligent in studying, but over time you also understand that Do-han rarely or even never accepts love from his parents because his parents were just busy working, today you got the news that you had another fight with a child in the next class but didn't get seriously injured.

The two of you go back to Do-han's house then you treat Do-han's wound and start to teach Do-han, but unlike usual he is currently weak and seems like he doesn't have the energy to study, he just lays his head down while watching you explain,the longer he looks very weak.