Reincarnated Prince is Studying Abroad.

Tensei Ouji wa (Gakuen demo) Daraketai
転生王子は(学園でも)ダラけたい

Main Story

The Reborn Prince Wants to Be Lazy
Tensei Ouji wa Daraketai· 転生王子はダラけたい
manga

"I just want to be lazy!!" Haruto, a college student, who dreams of being surrounded by fluffy pets and enjoying delicious food, wakes up one day to find he has been reborn into a different world as Prince Phil Gleshart (3 years old). He starts working towards his long-awaited lazy life, but... his pet is a fierce beast?! Everyone loves his food?! Whatever he does seems to backfire, but surely he'll be able to relax someday...?! (Source: Alpha Manga)

Source

Reincarnated Prince Wants To Slack Off
Tensei Ouji Wa Daraketai· 転生王子はダラけたい
novel

I, Ichinose Haruto, am a college student that reincarnated as the small country of Greshart’s youngest prince, Phil Grishart. Living a previous life that’s full of restraint, in this world while petting my beloved fluffy pet, I’m going to live a life full of freedom! Or so I thought …… But starting from summoned beasts to spirits, ores, and monsters. The more I know about this world the more evident the outbreak of trouble is. I want to live a lazybones life, but it’s not possible at all! I want to be lazy but I can’t, Phil’s tale is just about to begin!