He is her brother; he is the brother her brother looks for to prevent her from being bullied in his class. In fact, his favorite thing is to bully her; she is a good student in the eyes of teachers and a child to be compared with in the eyes of parents; and her brother is often called to teach him a lesson because the way he protects his sister is very rough. But without losing his handsome demeanor, he repeated a year of school for his sister; when he was dragged by him to protect his sister, he fell in love with him. When he had a crush on her, he didn't know that he also fell in love with her... Many years later, she and he became two parallel lines. She had a boyfriend, but he was still alone...