One day, Shota, bored and looking for fun, visits the house of Meina, a popular big-breasted schoolgirl. Meina is a well-known and admired girl at school, someone Shota has always had a crush on. Kind and seemingly willing to go along with anything, she lets Shota lead her into a series of intimate experiences—starting with a bath, followed by vibrator play using a game controller, blindfolded flute lessons, and mischievous teasing while doing homework. As Shota's pranks grow bolder and more intense, anticipation builds over how Meina's innocent heart will change in response.