Fuyou Kareshi 

Suzuki, who works at a retail store for interior goods, is ordered to change stores. Suzuki was not successful at getting along with his boss at the new workplace, but he became familiar with the transport company's employee, Irie, who was always entering and leaving Suzuki's workplace. Often, after work, the two went drinking together. One day, when Suzuki was drinking with Irie, suddenly he was pushed down and told: "Be my sugar baby"...!? (Source: Kadokawa, translated) Note: Includes the one-shots "Toire no Tanaka-kun (Kari) (トイレの田中くん(仮), Tanaka-kun of the Toilet)" and "Saijaku Counter Star (最弱カウンタースター, The Weakest Counter Star), and three extra chapters.