Son of the Mimura Family

In a quiet countryside town, childhood friends Yumi and Toshi navigate the confusing feelings of adolescence. As Toshi develops unresolved emotions for Yumi, his life takes an unexpected turn when he meets Yumi's older brother, Sumi. Drawn into a secret sexual relationship with him, Toshi finds himself trapped in a love triangle that blurs the lines between desire and friendship.

Years later, Kyu, Yumi and Sumi's younger brother, discovers the truth about Toshi and Sumi's relationship. Determined to win Toshi for himself, Kyu devises a plan to seduce him while they study together for college entrance exams. But his scheme backfires when he fails the exam while Toshi passes, and his feelings only grow stronger. As Kyu tries again, Toshi begins to avoid him, and Sumi reappears, forcing both brothers to confront their complicated past.

When Kyu returns to his hometown for a break, he can't stop thinking about Toshi and the kisses they shared. Toshi, too, finds his mind wandering back to Kyu, and despite their attempts to avoid each other, the pull between them becomes impossible to ignore.