 If you liked
Higeki no Genkyou to Naru Saikyou Gedou Last Boss Joou wa Tami no Tame ni Tsukushimasu.
|
 ...then you might like
Rekishi ni Nokoru Akujo ni Naru zo
|
Both animes are about how the main character dies and isekai into their favorite otome game. They both end up as main villians, but has to become strong and powerful if they want to survive in the world. Higeki is more about how she's scared of becoming an evil villian her character is supposed to be while rekishi embraces is. Throughout their life, they have a loyal "servant" and is surrounded by romance around them while being oblivious.