A chance encounter. Between the waves and the cliffs. At night. A week later, he got married. For many years, she no longer believed in happiness. They met. They play. They speak. They want each other. As a gift - unconditional. It's like a dance - on the edge of the void. One night. One night only. Their only night.
生活在人类和怪物之间忙碌的夏目,意外地在城市里与以前的同学团聚,从而回忆起被怪物纠缠的痛苦回忆。就在这时,夏目遇到了一个名叫Tsumura Ronglizhi的女人,她出现在了怪物的记忆中,这个怪物还给了她名字。
春日望美(川上伦子 配音)是一位非常平凡的女子高中生,某日,在放学回家的途中,望美听到了神秘的召唤声,从而来到了一个正在进行着源平之战的平行异世界之中。