Hayama Ryou

Ryou is the protagonist of this work. He is Aina’s childhood friend and relative, and they grew up together like siblings of the same age. Since they were young, he has always looked out for the shy Aina, and he grew up harboring a faint affection for her.

Ryou's grandfather privately runs a karate dojo called the "Hayama-style Karate Dojo," where Ryou himself studies karate. However, his skills in the martial arts are not particularly noteworthy.

Regardless of the route the story takes, he becomes highly conscious of Aina’s erotically developed body. Fearing that their current comfortable relationship might be ruined, he finds it difficult to move their connection forward.

For better or worse, Ryou is a kind and ordinary person who is unable to understand the true nature lurking deep within Aina: her lewdness and her masochistic desires.