A young man and his pony-tailed younger cousin go to a public bathhouse together.
 
(Source: DLSite, translated)

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. 
- Includes 1 extra chapter.

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