Shen Yingli is a scumbag. He dates people regardless of gender, swindling them out of money and playing with their feelings. After someone takes revenge on him, he is forced to bind himself to a System and enter different worlds as a married partner.
[Shared Possession of the Twins]
He is a poor beauty who, because of his father's massive debt, is forced to stay by the twins' side and become their private possession.
Day after day, he is tormented and covered in bruises, while the damage to his heart is even worse. It leaves him in unbearable pain.
To escape, he becomes obedient, using every means he can think of to please them and let their guard down.
But they see through it all. His attempted escape fails, and he is caught and made into their obedient little wife, raising his own biological children.
[The Beast King's Private Property]
He is an innocent little human from the lower city who sneaks into the upper city. The Beast King takes a liking to him, marks him, and carries him back to his nest.
From then on, he obediently fulfills everything expected of a little wife.
Unwilling to accept this, he secretly waits for the man to let his guard down. When the moment is right, he stabs him and runs.
But he is caught and brought back, forced to nest forever in a soft, warm den and enjoy everything the man gives him.
[The Poor Little Thing Belonging to a Traditional Patriarch]
He is an illegitimate son who is never loved, but at a banquet, a man takes a liking to him. A contract is quickly signed, and he is sent off to the man.
From then on, he is forced to obediently accept all the old-fashioned lessons.
Unwilling to be trapped by the man forever, he runs away before his first heat, deleting everything connected to him.
On the eve of his wedding, he is caught and kept at the man's side forever. Only once his belly grows does the man grant him a little freedom out of pity.
[This blurb was written on September 2 and a screenshot has been saved. Please don't steal the premise.]
Theme: Love life.