Youyou's life was trapped in boundless darkness due to depression, and Lin Yu was his only light. But on that birthday, which he was full of expectations for, he opened the door with a gift, only to see her staying in that lightless room forever. Later, he guarded the empty room, holding her cold body, and finally understood that there would no longer be Youyou in his world.
Concept: A girl with depression and the only light in her life could not wait until dawn after all