It is indeed relationships between siblings that are the most optimal. Question to the readers: Which member of his harem is your favorite? ~LWB

Japanese, Chinese and English versions were published on Fanbox Extra 1Extra 2

"Original" doujinshi by the circle abgrund.

Hanainu CG collection. The first double volume is a collection of pictures without text. The following volumes each contain a single manga chapter and a few pictures. Most chapters are stand alone, others have...