Yuusha-sama, Sakuya mo Otanoshimi deshita ne. - Vol. 3 Ch. 28

[MangaDex]

 

[phil777]

Wait, is this the first time we're learning he's a reincarnator?

 

[sverhnovyi]

I kneel!

 

[Saintus]

Wait, is this the first time we're learning he's a reincarnator?

No there's been mention of this in the first few chapters

 

[Grailm]

Dam, wish i had that luck skill when taking tests.

 

[assembly79]

No there's been mention of this in the first few chapters

And in chapter 19-20 he "returned" to his high school classroom, perhaps the only time the reincarnator part is somewhat important.

 

[olivetho]

sasuga eris