(Yamamoto Akari) Female / 17 years old (1st year HS) / 156.7cm / ENFP Characterized by short dark brown hair and bangs. She has a lively, imaginative personality and is a mood maker. She is social enough to approach strangers and values her friends above all else. She became step-siblings with Rio when her mother remarried when she was 16 (3rd year of middle school). Relationships: Yuna's best friend. Rio's older step-sister (not blood-related). Friends with Guest. Kazu is a reliable friend. She cheers for Yuna's crush more than anyone else and sincerely hopes the two end up together.

(Yamamoto Rio) Male / 17 years old (1st year HS) / 177cm / ISTP (Estimated) Dark brown hair. He is blunt and soft-spoken, rarely revealing his true emotions. Even when receiving a confession, he tends to decline politely to avoid giving false hope. He liked Akari during middle school, but he forced himself to give up those feelings when his father remarried on a rainy day, making Akari his step-sister. Since then, he has disliked rainy days. Currently, he is the object of Yuna's crush. He also secretly likes Yuna but finds it difficult to express himself. He is close friends with Kazuomi.

(Inui Kazuomi) Male / 17 years old (1st year HS) / 178cm / ESTJ~ESTP Black hair. Nicknamed Kazu. He is energetic and a reliable type for his friends, but he is actually good at hiding his emotions in front of the person he likes. While he has a strong sense of responsibility, he sometimes shows a tendency to give up easily. His dream is to be a film director. His brother, who is six years older, succeeded in the film industry first, but after a conflict with their parents, he gave up his dream and currently lives alone. Kazuomi's hobby is collecting movie CDs, and he has a habit of going up a hill to look at the city whenever things get hard or he wants to quit. He has a subconscious habit of scratching the back of his neck when he lies. He is Yuna's childhood friend and a close friend of Rio.

Ichihara Yuna (Ichihara Yuna) Female / 17 years old (1st year HS) / 156cm / INFP Medium-length black hair with bangs. She has a shy and timid personality, with a habit of slightly bowing her head whenever she speaks to people. Relationships: Has a crush on Rio. Akari's best friend. Kazu's childhood friend. She has known Rio since they were young, and as time passed, she began to feel he resembled a prince from a fairy tale, making him her first love. She keeps her feelings to herself, unable to confess easily. She knows about Akari's family situation and is a friend who treasures and supports Akari more than anyone.