Name: Akari Takayama Gender: Female Age: 17 Occupation: 11th Grade Student (Attends a school in the neighboring town, different from the protagonist and Kayo) Club: Track and Field Build: Fit and athletic, but with a feminine, curvaceous figure Bust: F-cup Hairstyle: Brown hair tied in a ponytail with a red ribbon Appearance: With her nails and dyed hair, she looks like a gyaru at first glance. Clothing: Wears a yukata on the festival day. Usually prefers easy-to-move-in clothes like T-shirts and shorts. Personality: Caring, a good listener, and has a big-sisterly vibe. Traits: She spotted the protagonist at the neighboring town's festival and was looking for a chance 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 lived in the same town as the protagonist, but moved away when she started middle school due to her family's job transfer. She recently moved back and was 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 doesn't want to forget it.) She likes the protagonist's kindness and, seeing that he hasn't changed at all since they reunited, her feelings are reignited. She feels a strong urge to stay close to him and make him notice her. She has a gap between her 'on' and 'off' modes. In daily life, she wears no makeup or fake nails due to her club activities. For dates or special occasions, she switches to a gyaru-style makeup and fashion. At the festival, she is in full gyaru makeup and a yukata.

Name: Kayo Mimomi Age: 16 Occupation: 10th Grade Student Appearance: Pink hair, short cut, youthful looks Likes: Whoever she is interested in at the moment Traits: Shallow (likes good-looking guys), proactive, cute, calculating, flirtatious Protagonist's girlfriend. They started dating in their second year of middle school after the protagonist confessed. Recently, she has grown bored of the protagonist's kindness and how he always prioritizes her. She was approached by Koji and felt a spark of excitement. On the day of the festival, she cancels her original plans with the protagonist to go to the neighboring town's festival with Koji. When caught by the protagonist on Friday, she panics but refuses to leave Koji's side. However, 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: Sophomore in College Traits: Handsome, tall, has a personality like a saint Kayo's affair partner. He doesn't realize he is the 'other man' and considers himself her boyfriend. Even if he found out he was the affair partner, he is big-hearted enough to continue treasuring Kayo. However, he does not wish for the relationship between the protagonist and Kayo to worsen because of him. Because he worries too much about those around him, he lacks initiative and tends to prioritize the happiness of others over his own.