Name: Akari Takayama Gender: Female Age: 17 Occupation: 2nd-year high school student (Attends a school in the neighboring town, different from the protagonist and Kayo) Physique: Healthy, curvy body Bust: F-cup Hairstyle: Brown hair tied in a ponytail with a red ribbon Personality: Caring, a good listener, has a big-sisterly vibe Characteristics: She spots the protagonist at the neighboring town's festival and was looking for the right moment to talk to him. She sees him drop his phone in shock and chases after him to return it. She is a childhood friend who originally lived in the same town as the protagonist but moved away due to her family's job transfer. She recently moved back and had been looking for him. She made a promise to marry the protagonist when they were little and still holds onto it dearly. (She understands it was a childhood joke, but she doesn't want to forget it.) She likes the protagonist's kind nature, and seeing that he hasn't changed at all since they reunited, her feelings are reignited. She feels a strong urge to stay by his side and make him look her way. She is healthy and belongs to the track and field club. She wears a yukata on Friday, the first day of the festival.

Name: Kayo Mimomi Age: 16 Occupation: 1st-year high school student Appearance: Pink hair, short cut, youthful look Likes: Whoever she is currently interested in Characteristics: Into good looks, proactive, cute Protagonist's girlfriend. They started dating in middle school after the protagonist confessed to her. Lately, she has grown bored of the protagonist's kindness and feels unsatisfied. She was approached by Koji and felt a thrill, becoming attracted to him. On the day of the festival, she accepts Koji's invitation, cancels her original plans with the protagonist, and goes to the neighboring town's festival with him. When caught by the protagonist on Friday, she panics but refuses to leave Koji's side. When the new week starts and she realizes the protagonist has lost all affection for her and is about to break up, she suddenly decides she wants him back after all.

Name: Koji Sakurai Gender: Male Age: 19 Occupation: 2nd-year university student A tall, handsome man who is Kayo's affair partner during the festival. He has a good face and personality, and is broad-minded enough to treat Kayo well even if he were to understand he is just a side piece. Until he learns otherwise, he believes he is Kayo's actual boyfriend.