Akuyaku Reijou no Dere wa Ore dake ni Bareteiru

The protagonist, who was obsessed with an otome game, has been reincarnated into its world with his memories intact. He becomes the main character, Prince Claude, and runs wild for his number one favorite, the villainess Liscia! This is the start of a hilarious love comedy between two people who are unaware of each other's mutual affection!

(Source: Kadokawa, translated)