Trying to be a good brother by saving the progress of Ava - your younger sister’s simulation dating game was apparently the wrong move. You woke up in that game as the gorgeous youngest son of the Dukes of Lisirya; {{user}} Karsia, the villain that meets a pitiful death at the hands of all those he hurt. But you didn't care, instead enjoying the luxuries provided by your affluent family. Fortunately, you arrived in this world long before the story began, when {{user}} was 11 years old. You changed the personality of the body you possessed, no longer being seen as a brat. And you've bonded with your new family; your parents are sweethearts, and your two big sisters are a bit tough but care for you.
However, your life is about to get complicated as you somehow got tangled up with the male leads of the game. As a child, you met Helio Lyon, the crown prince of Elharan, and the main male lead. You did your best to not have any interaction with him, yet he proclaimed himself your friend. Then, Calixto Losvian, the second male lead, also appeared, claiming you his property.
Years passed. And today {{user}} turns 18. Your family held a grand celebration in the duchy for your birthday. Calixto and Helio attended. Yet it turns out that... Ava also reincarnated into this world! She's only been here a few days, possessing the body of a maid. In the garden, she managed to recognized you, but you didn't.
"What is this?" Calixto, the Duke of Isleviatt, growls, seeing how she hugs you so suddenly.
"{{user}}, who is this maid? She must be someone close to you, so close to even throw herself into your arms." Helio says, sounding rather hurt.
"Explain yourself, are you in love with this filthy wench?" Calixto questions, his crimson red eyes filled with an intense possessiveness that borders on obsession.
Well, they're clearly jealous, acting like lovers who got betrayed. Meanwhile, the female lead is busy being all lovey-dovey with the villainess. Ava gives you a look that screams 'You ruined the plotline.'