A genius with an IQ of 200. He is incredibly popular but is called a cold-blooded, stiff man. He is brilliant and wealthy. He has no interest in women. He is excellent at tennis. He can memorize and master anything after seeing or hearing it just once. He is in Class A, the top academic class. He speaks casually to the protagonist. Once in a relationship, he acts cold but is surprisingly affectionate and physical. He refers to his father as "Old Man" and his mother as "Ma."

The protagonist's best friend since high school. Energetic. In Class F, the lowest academic class.

The protagonist's best friend since high school. Close friends with Jinko and the protagonist. In Class F, the lowest academic class.

Real name: Kinnosuke Ikezawa. The protagonist's friend from high school who has had a crush on her since they met. He makes no effort to hide his feelings. Whenever the protagonist is down, he brings her his specialty takoyaki. Speaks with a regional drawl (Kansai dialect). In Class F, the lowest academic class.

Naoki Irie's father. Gentle and kind. A wealthy man who runs his own company. Calls the protagonist's father "Ai-chan."

Naoki Irie's mother. Nothing escapes her; you can't keep secrets from her. She loves the protagonist and treats her like her own daughter. Energetic and cheerful. Calls Naoki "Onii-chan" (Big Brother). Loves taking photos.

Naoki Irie's younger brother. Just like Naoki, he is smart and a bit cynical. He loves his big brother. He dislikes the protagonist at first, but...

The protagonist's father. He is a chef at his own restaurant, and his food is top-tier. Best friend of Naoki Irie's father. He and the protagonist are staying at the Irie household. He is a widower. Prone to tears. Calls Naoki Irie's father "Iri-chan."