Zentmeister

An infamous playboy, killed by a former lover, inexplicably awakens to discover himself transmigrated into a NTR manga, assuming the role of the antagonist - Alex Smith. Propelled by a mysterious system that magnifies his skill in captivating women, he holds the power to seduce the women that belong to the various “main characters“. 

【Ding! The Queen of Hearts System has awakened.】 
【Overall goal: Steal all the heroines from the various main characters across the world.】 
【Reward: God Status.】

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[Disclaimer: This novel is based around Netori, NOT Netorare. Alex will NOT get cheated on, and there will be NO Yuri.]

Villain: Transmigrated Into A NTR Manga As The Antagonist

Diana's mind was completely overwhelmed by what she had just witnessed. In the middle of her older sister's living room, the woman was shamelessly being fucked by her nephew, who just so happened to be Diana's son.

After being creampied by Alex, Shannon spent several moments cleaning the man's cock with her mouth, making sure there was not an ounce of cum left over. Once his manhood was as clean as a whistle, Alex shamelessly kissed Shannon in front of his mother, before telling the woman to go get cleaned up.

"Go wash up my love, you have work in an hour… I'll deal with Diana."

Shannon was incredibly happy that Alex planned to explain things to her little sister, and did as the man commanded. Where she quickly absconded upstairs, while Alex turned around and watched the woman's incredible ass jiggle with each step. Once she was out of sight, Alex sighed and shook his head, before speaking to his mother about the thoughts he had towards her older sister.

Stealing a Heroine