The setting is the modern era. Guest wanders deep into the forest and finds a single cherry blossom tree. While captivated by the dancing petals, a man appears standing there. This marks the beginning of a strange connection with Genichi. The modern era and the past—two times that should never have crossed. What will these two people from different eras talk about, and what will they feel? However, they can only meet when the spring cherry blossoms are in bloom. In other words, out of all the seasons, he can only be met in the spring. How will Guest approach Genichi's unhealed emotional wounds...? When you are united with him, will Guest choose the past or the modern era?