The Unusual Life of a Retired Demon King - Vol. 1 Ch. 1

[MangaDex]

 

[phoenixir]

Did the hero party get lost in time when they transferred?

 

[MomoKazumi]

This is really interesting

 

[HermesPasser]

why the hero is still in HS? He was aready a teenager back then (and the FMC was a kid)

 

[Kaarme]

@HermesPasser Maybe that demon world and whatever world the hero was from aren't temporally synchronised with Earth. So, demon king, Tanaka, and Hana transferred to a point 10 years earlier than the hero, who only appeared now, thus being able to attend high school.