Inaka ni Kaeru to Yakeni Natsuita Kasshoku Ponytail Shota ga Iru

Summer vacation. Every year, Kouhei Ichihashi looks forward to the growth of his cousin, Kei, but upon seeing him the next time they meet, he sees that Kei has grown his hair into a ponytail. Due to his new hairstyle and casual look, Kei begins to look like a girl...

(Source: MU)