[not all the bottoms in the short stories are muscular]
1-2. A new employee at a company, Hanada Sakutarou meets the carefree yet earnest Chouno, who is different from the strict seniors he had before... in more ways than one. 3. Haru is a deliverer, he has a secret crush on his partner, Kudou, but everything changes when a weird customer comes into scene. 4-5. The customer from chapter 3, Suzuki had sex with Shin, a guy he met at the bar, and they've been living together since. Feelings bottle up, but their weak bond makes Suzuki anxious. Extra. Featuring all couples.
Chou to Hana no Kankeisei