Amagi Rina

A childhood friend who lives directly across the street from the main character, Nachi Mizusawa.
Her father runs the largest local food company, Tenjou Foods, and she is the daughter of the president. She is an only child and has no siblings.

She is a kind, quiet, beautiful, and talented girl with good grades, her personality make her easy to get to know and sit down with. She is wealthy and modest, and does not give off an air of superiority. She has a good appearance, and above all, she has beautiful large breasts, which are said to be the best in school.

She loves the main character whom she has known since childhood, since they live across the street from each other. She treats him as if he were her own younger brother. she is unaware that she spoils Nachi because of her nature.

Because her house is close to the beach, she and Nachi have been going to the beach for a long time.
She loves swimming and is good at it. She wanted to join the school swimming club but didn't considering the home circumstances of both her and Nachi. Instead, she invited Nachi to join a swimming club at a nearby public pool about three days a week after school.

Because she is the daughter of the Tenjou Foods, few boys have confessed their feelings for her, and all the boys who did were rejected. Her reason for refusal is that deep down she is angry that Nachi hasn't made a move yet.