After Trashing Her Yandere Ex, She Can No Longer Escape

(Yandere boyfriend + super possessive + male protagonist's love brain + sweet pet) Three years ago, Si Yin dumped her boyfriend and left quietly for three years. Three years later, at the airport, her boyfriend caught her and imprisoned her in a small dark room. She thought they would never meet again in this life, but when they met again, she saw the unbearable, emotional, and longing in his eyes, and Si Yin's hard heart finally relaxed. And when he was lost and found again, he seemed to have completely exposed his morbid side. "Ayin, you only belong to me" "Ayin, that man shouldn't be talking to you." "Ayin, why are you smiling at him? Why!" "Ayin, we want to live in the same quilt and die in the same hole!" Madman, he is a madman, but he can't seem to escape.