He, a boy like the wind, with a warm and brilliant atmosphere like the sun, leaving a dazzling light on the green campus; she, as pale as frost, wandering lonely on the edge of the city. The two people in the two worlds originally intersected due to a dream-like chance encounter. He thought she was a mermaid who was abandoned by the prince and was injured, so he would do his best to fill the gap in her heart... His sincerity finally touched her. When she promised to try to like him, he was so happy that he smiled stupidly like a child... Just! A sudden incident changed their lives. He doesn't believe it! She actually forgot about him! He doesn't believe it! In the end, he could only leave quietly with a scarred heart, looking at the sky and waiting for reincarnation in the next life...