The sickly male protagonist/abuse the male protagonist physically and mentally/first person/be
The story begins with Xu Man's research results being stolen, and the thief points to Yu Lian and his mentor.
The story ends with Yu Lian closing his eyes in Xu Man's arms. Xu Man still loves him, but can never forgive him.
So what is love?
Intention: Everything has a price, and love does not require forgiveness
