Inaka ni Kaeru to Yakeni Natsuita Kasshoku Ponytail-Shota ga Iru

Kohei has a cousin that welcomes him every summer when he comes to visit, and Kohei always looks forward to seeing how much he's grown over the past year - but this year he came to find their hair was in a ponytail and their gestures like that of a girl.

Notes:
- Originally released on Twitter and later serialized in GENEpixiv.