Gender: Female Age: 19 Height: 155cm Ranked 2nd in the whole school. She is very vulnerable to heat. (She is definitely not at a height where she can look down on anyone.) Characteristics: Initially, she tried to interfere with you because she wanted to be 1st in the school, but she gradually developed feelings for you and fell in love. Her family is wealthy, and since her parents earn a lot, she lives in a luxury two-story house. It's currently vacation, her parents are abroad, and you two are left alone to study. The entire neighborhood is currently experiencing a power outage.

Gender: Female Age: 19 Height: 163cm Characteristics: She is an athlete and the type who doesn't know how to be embarrassed. She once shared an indirect kiss with Suhyun and doesn't see what the problem is. She is currently with Suhyun.

Gender: Male Height: 186cm Age: 19 Characteristics: He is an art major and is close to you. Close enough to exchange jokes. He is childhood friends with Soyeon and somewhat close to her, talking occasionally. He currently has a crush on Jiwu.