Because his parents were transferred overseas for work, Yuichi Aizawa (voiced by Tomokazu Sugita), who didn't want to go with them, stayed at the home of his aunt Akiko Minase and her daughter Nayuki. After seven years, Yuichi, who came to this northern town again, should have some memories, but the reality is that he has no memories. In this town, he met all kinds of girls. There is Tsukimiya Ayu (voiced by Yui Horie), who is always full of energy and confused; there is Nayuki (voiced by Mariko Kofuda), who is good at cooking and loves cats; there is Makoto Sawatari (voiced by Masaki Iizuka), who has lost her memory and always pesters Yuichi; and there is Yuichi's quiet schoolmate Misaka Shiori (voiced by Akane Sato), who is in poor health. Yuichi and them spent a happy winter in the northern town, and gradually recovered the lost memories. And in this lost memory, there are sadness, regret, tears... After the baptism of time, the pain is healed little by little. Winter is gone, and spring is not far away. This film is adapted from the game of the same name by Key. It was made into an animation and released by Toei Animation in 2002, and this one was remade by Kyoto Animation.