This is a story that took place during the war years. The male protagonist's childhood environment was in the countryside and mountains. Due to a misoperation, one of the playmates was injured and even indirectly led to the playmate's death. But for some reason, he missed the opportunity to explain. But this also became a knot that troubled the male protagonist in the future, and the knot became deeper and deeper. When he grows up, the male protagonist marries the sister of his dead playmate. How to open this knot in his heart?
Intention: How to make up for the wrong behavior in order to untie the knot. If it cannot be resolved, this person's life will be deeply affected.