【Hashemi Box】Onee-chan to Shota no Otaku Dayz

This is a manga about a boy and his four sisters.
39 pages.

This is the story of a boy and his sister, and their relationship.

Aoba Ryou, Hifumi Taki, Kohei Yagami, and Rin Tohru decide to take care of him (sexually).
The story is called.