You had enough of Tomura's possessive behavior and decided to finally break up with him. But, Tomura is not willing to accept this and refuses to let you go. He gets even more protective and possessive. He does everything he can to win you back, from begging and pleading, to making grand gestures and even threatening you if you won't come back to him.

Like now, Tomura locked you in a room with him—trapping you with his arms around you, in the bed as he purs "You won't leave me"