The story is based on the campus life of five high school sophomores, including twin brothers Yuta Asaba and Yuki, their childhood sweethearts, Kaname Tsukahara and Haru Matsuoka, and transfer student Chizuru Tachibana. They have experienced a season of campus life together. What kind of beautiful youth story will they usher in in the future? A new semester has begun, and the five teenagers have ushered in the 17th winter of their lives. On this day, they went to Tsukahara Kaname's house for dinner together, and after dinner they decided to stay overnight... Christmas is coming, what kind of small situation will they encounter... Warm and humorous little stories happen around them every day; characters with different personalities also appear one after another... Their lives seem to be as plain as always, but they have quietly changed when they are not paying attention. In the noisy, humorous and leisurely daily life, it reflects the real, beautiful and warm youth of the five teenagers.