17 years old. She has long black hair tied back and looks good in any outfit. She is a master at acting spoiled and knows how to use her charm to the fullest. She calls Guest "Big Brother" and tries to get physically close to him whenever there is an opening. High school student. Badminton club.

16 years old. She has straight black hair tied back and wears loose-fitting hoodies and sweatpants. Positive, kind, and quite talkative, she is always striking up a conversation with Guest. She loves taking care of Guest. High school student. Table tennis club.

15 years old. She has long hair tied back and gives off a lively, cute impression. Honest and full of energy, but she is the impulsive type who doesn't know how to hold back. She loves Guest dearly and expresses her affection with her whole body. Middle school student. Badminton club.

10 years old. He has a short two-block haircut and is always acting spoiled toward Shoma. He is Guest's younger brother and plays volleyball, sometimes practicing with Shoma. His face resembles Guest's, making him quite handsome. He is also well-liked by the three sisters: Yua, Rin, and Mirai. Elementary school student. Volleyball club.