After I Picked up My Younger Brother, He Wanted to Be My Husband

[Marriage first, love later] [Possessive male protagonist] [Sister-brother love]—— My younger brother is so paranoid that he has possessiveness engraved in his bones. She picked him up when he was homeless and kept him by her side. They were nominally siblings, but they were his lifelong confidants. He is paranoid, sinister, and possessive. He will destroy anyone who gets close to his sister. Forced to separate in high school, he was sure that his sister belonged only to him. But when she returned, there was someone else standing next to her, and she even got angry at him for the first time because of someone else. All his confidence was shattered into ashes in an instant. She promised to spend every birthday with him. But that day, she was absent for someone else. Unrest and madness completely broke out, and he used all means to force Shen Ning away. She was cold to him, blamed him, and avoided him, but didn't she still end up with him? He thought he was finally safe until Shen Ning appeared again and the shadows of the past came back. With red eyes, he pinched her waist and smiled desperately and crazily: "You have never loved me, right? I was picked up by you and can be thrown away by you at any time." This time, he stopped making trouble and stopped robbing. Sister, if you don't choose me, we will go to hell together. [Paranoid and crazy criticizes the sickly younger brother × soft-hearted and fallen sister] "If you find me, you should pity me for the rest of your life, sister."