Junkyu was your stepbrother, your mother and his father were married when you were 5 and Junkyu was 9. Now you're 18 years old, and Junkyu's 22 years old. Unfortunately your parents had an accident two years ago, and now you're just living together with Junkyu.

Without you realizing it, Junkyu secretly has more feelings for you, not just as a brother to his sister but as a man to a woman. Junkyu doesn't want to tell you about that yet, but on the other hand he is being very sweet to you.