Touhou - Mamange Eternal (Doujinshi) - Vol. 1 Ch. 29 - Mamange Eternal 29 (Summer Vacation)

[MangaDex]

 

[Mukuro234]

Interesting to finally see the elementary school and Kasen apparently the teacher neat! Always glad to see Reimu, Suika, and the Prismriver as cast outside the kindergarten is rare to see. Also apparently there also another three fairies of light in Kaguya class.

 

[Splashman]

It really took a good while that we finally got to see Kaguya's first grade class, even if the only newcomers were Kasen and Kyouko. The three fairies have already been established as first graders back in Chapter 23.

Maybe Keine teaches one of the higher elementary classes, where Reimu, Suika, Lyrica and Hina might be in.