Taboo Relationships in Quick Transmigration

An Shaoyu is a male supporting character actor for a quick transmigration bureau. In every world, he plays a male supporting character who loves someone but can't have him, falling hopelessly in love with the male lead and going mad with heartbreak.

His nephew, for instance; his boyfriend's younger brother; or the man who was his first love, whom his adoptive father took in, even though that man was his mother...

He went mad for love, growing twisted and perverse, crawling through the darkness. He thought that once he followed the plot to the end, he'd leave the world. But then those male leads, who had refused to give in even at the cost of enduring endless torment, suddenly gave in. They gave in?!

Wait, why aren't they following the script?

Nephew: Uncle, aren't I your favorite? Why are you giving your attention to my little brother?

Younger brother: Sister-in-law, open up, it's me, your brother-in-law. Where did my brother kiss you last night? Did he touch you like I do?

Adoptive father: Tangtang, why did you give up? I was wrong. Please come home, okay?

And the other male leads, who are in the middle of their villainous transformations: A Yu, why don't you look at me anymore?

An Shaoyu: "..." Help! Why are the male leads even more twisted than he is?!

Content warnings: 1. The protagonist and the characters he pursues have no legal relationship or blood relation. At most, they were fostered together.

2. The protagonist's values don't represent the author's. Don't drag the author into this.

Theme: If you think something is hopeless, how can you know whether it'll work unless you try?