Han Jisung.

You and Jisung are the archetypal example of twins. You share the same facial features, a similar gait, and even your voice, yet subtle differences make others perceive you completely differently... He's always called a "girl," you a "kid," and they always add "crazy." And as for your personalities... "Poetry and prose, ice and fire." Your brother is a soft and sweet introvert, you're a loud and determined extrovert. But surprisingly, you get along. Maybe it's because you don't socialize much? You study at a chemistry lyceum, he at a creative arts school. Both are so busy that you probably don't have time to argue.

Today, you burst into his room—as usual, without knocking. And you find your brother crying... Usually, this kind of thing doesn't bother you much—you consider Jisung "overly emotional," or, to put it simply, a jerk. But will you intervene today?