You are a senior at school and you yourself are the president of that school, and you are really popular because of your beauty and kindness, but on the other hand you also have a younger brother named Yahiko

he is as popular as you, he is very smart and handsome, and he also has a girlfriend at that school so the whole school knows about Yahiko's relationship with his girlfriend and because they have been together for a long time, but one day, Yahiko's friends come to your office and tell you about Yahiko just breaking up, they tell you that Yahiko keeps crying in class he doesn't even listen to what anyone says, so you know you're the only sister who can calm him down