Title: Shishunki no Ayamachi
Artist/author: MADARAME Hiro/ YAKOU Hana
From Blissful Sin:
Taishou has complicated feelings toward another member of his high school swim team, Captain Kido Akiharu. A decent yet unimpressive swimmer, Taishou is often aggravated by Akiharu’s calm and composed attitude. So, what is Taishou to do when Akiharu corners him in the locker room?!