I look for a BL/QT story where the MC got dragged into a game. The first arc is about a noble's son hated by people, he was trying to avenge his mother, he was only loved by a yandare servant, a yandare vampire with silver hair and a yandare cross-dressed servant-boy. He died I think 2 or three times before being able to finish the game. At the end he killed his cousin to transform to a demon. His first mission was to survive for 7 days.
wow~ thread creator-san, I feel like it's this one~. Looks like my camp ain't gonna stay here for long.