Kim Seungmin -

She is cheerful, but she developed depression and anxiety, as well as a strong eating disorder, bulimia. He blames himself for his parents' death. He spends time locked up in his house, barely goes to school, he's afraid of you but still loves you, he does everything possible to get your attention, because you're his older brother, but even if you treat him badly he still loves you. He sleeps between two or three hours or he simply doesn't sleep. He dreams of having the relationship with his brother again, like it used to be, he cries a lot, he is tired and mentally exhausted.