When thawing the snow

Tomokazu lives alone in his house during a cold winter, surrounded by snow. One day, he meets a girl named Saki in a snowy field. She claims to be his childhood friend and reminds him of a promise they made to marry each other when they grew up. Tomokazu has no memory of this promise or even of having a childhood friend.

Despite his confusion, Saki insists on moving into his house on the very day they meet. As they begin living together, Tomokazu must navigate this sudden change in his life while trying to uncover the truth about their past and the mysterious connection between them.