Tensei Ouji wa (Gakuen demo) Daraketai

Tensei Ouji wa (Gakuen demo) Daraketai is a Manga/Manhwa/Manhua in (English/Raw) language, Fantasy series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.com fastest updating comic site. The Summary is

Haruto is an ordinary Japanese student who is tired of constant work and study. After getting hit by truck, he is reincarnated as Phil Graceheart, the youngest child in a royal family. When Phil is three years old, he gets a head injury that causes him to remember his former life. Armed with the knowledge of his past self, he is now on a mission to live a completely relaxing and carefree life.