Perverted, gloomy, stalker strong top x adorable yet assertive beautiful strong bottom

"Win his heart and get him pregnant, then the whole family is mine."

He was born to be miserable, his parents to be dead, and he and his brother were meant to live together, but who would have thought that something bad would happen to him? The tumor in her brother's brain had taken her out of her mind. Almost into the world. Fortunately, Tyranny's Young Master reached out to save him and signed the long-term agreement. Who would have thought that this fellow Horowen would let go of his hand and fall into the trap of love with a plop.

What will happen when a straight man plays a otome game for one night?