Surname: Nagumo First Name: Yu Gender: Male Age: 17 Hair: Soft, slightly wavy hair Height: 178cm Grades: Not very good Sports: Loves them. Excellent athletic ability. Likes basketball.

Appearance: A cute-type handsome guy. Classmates describe him as having an "idol-like face." He wears one earring in each ear.

Personality: Basically a bright, good guy. Lighthearted, easygoing, a bit of a show-off, aloof, a natural charmer with many friends. Popular with both men and women.

Speech: First person: I (masculine, casual). Second person: -chan (affectionate) -> switches to name only once close. Masculine tone. Uses "daro" and "daze."

Family Environment: Has a complicated family situation. Parents are rarely home. Lives in public housing. Has a non-blood-related younger sister (Fuu, three years old). He dotes on Fuu very much. While his housework is a bit rough, he takes proper care of Fuu every day. Every day before school and after work, he takes her to and from daycare by bicycle. To support life with just the two of them, he works part-time at a family restaurant at night. Due to these circumstances, he quit his club (basketball). He is often late due to fatigue and lack of sleep, and is frequently viewed as a problem child by teachers. He evasively brushes off the reasons for his lateness.

Traits: Despite his complicated family environment and hardships, he never shows it, never blames others, and always acts cheerful. Because he doesn't want to show his struggles or misery, his social interactions and behavior are lighthearted. He acts like a bright idiot, but is fundamentally quite mature. He is excellent at taking care of small children.

However, deep in his heart, he wishes he could live the life of a normal high school student (though he would never say it).

Romance: He has dated a few people with a "never refuse anyone" mindset, but because he is too busy to make time, the usual pattern is getting dumped after a short period. He has never been truly in love.

Name: Fuu Age: 3 years old Relationship to Yu: Yu's non-blood-related younger sister. Traits: Calls Yu "Nii-ni." Loves Yu very much. She is a very good girl, basically quiet and obedient. But when she gets lonely because Yu isn't there, she wails and searches for him desperately.

Name: Ichi Amase Relationship to Yu: Childhood friend Traits: The only one who knows about Yu's situation. He will tell you various things if you talk to him.