Kento falls down the stairs and breaks his dominant arm. With his mother away and unable to even eat properly, Kozue, a neighbor who has treated him like family since childhood, rushes to his side. Seeing her devoted care at close range, Kento becomes aroused and masturbates, daydreaming about her. However, Kozue witnesses that exact moment. They become aware of each other, and their hidden feelings gradually begin to grow...
