How to train adolescent (3) Special edition

the publisher:
Author: Yumi Nakata
Size: 128mm x 182mm
Number of books: 1
Language: Japanese
Category: Youth manga, manga
Latest release date: 2020-07-27

Synopsis:
Kosuke who became a brother -in -law from a classmate.
Kanon declared her house for a while, but they decided to go on a hot spring trip.
I wonder if the relationship is approaching with a lot of two people, and there is a person there?
The 3rd brother and sister love comedy who is too cute !!