Stack overflow?
It's not that one but it is similar, the mc ends up getting trapped in the bl Sim and their is even a vampire and I remember there was also a butler. And when he finally completed the Sim it was declared as an s rank or something like that but he finds out he is not the only stuck in the system and or something like that it was a while ago
If it's manhwa maybe this
https://www.mangago.zone/read-manga/raiding_the_vampire_count/
*manhua
Ahh it's similar but the mc had black hair i rememberi found the comic on bili bili and that the mc had to repeat the first game senario over and over until he could complete it making him the first to complete an s class game or somethinglikethat, thank u though for recommendation,
Does anybody know the title to this one bl where the character who was always lucky and good at video games ends getting stuck in a dating Sim. And then when he finally completes the game he ends up meeting the creator of the game ?