Chi Huaizhu and Lin Xinyu are well-known rivals.
One day, Lin Xinyu was hit by a stone. Everything was normal, except that he remembered Chi Huaizhu as his savior. From then on, he became attached to Chi Huaizhu. Chi Huaizhu had no choice but to get along with him day and night. After a while, fortunately or unfortunately, Lin Xinyu hit his head again and his memory recovered, but he could not remember the intimacy with Chi Huaizhu. The two fell in love and killed each other in Lin Xinyu's constant amnesia and recovery of memories.
(This article is slightly supernatural, so don't delve into it without logic)
Concept: There are always many surprises in life