can someone help me find this? i forgot the name

- a webtoon
- in the real world there are these two siblings a brother and sister, the sister plays an otome game and paused before a dating cutscene
- brother got curious and played the whole game
- sister gets furious and hit him but he eventually died and reincarnated in the game as a side character
- said side character was supposed to be the problematic son in the family but he kinda changed that
- and for some reason the dark duke and crown prince are HELLA obsessed with him
- duke would always claim that the side character is ‘his’ belonging
- crown prince wants him too
- eventually we found out that the sister died and got reincarnated too lol but as the female protagonist’s maid and is sure to make sure the story goes along the original plot

ive only read up to that point but i forgot the name pls help T-T