The bird wants to fly, but its master doesn't want to.
"Yao Yao, you can only love me. I am the only one in your world."
"You are mine, and I should control your life."
Just like the title of a man imprisoning a woman, forced love, a small dark room, that's it.
Crazy, paranoid and perverted male protagonist vs. Pitiful, weak and down-and-out female protagonist
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Purpose: Get rid of fate