Tokyo Middle Club

The "Middle Club" is a male prostitution store that has a lineup of middle-aged men to provide customers with the highest level of healing. Ueno, a timid office worker with a crush on his boss, ends up accidentally choosing an older man who resembles his boss out of curiosity. Ryuuichi, a handsome college student, becomes captivated by the older man he randomly chose. Meanwhile, Hisakawa, a salesman, is chosen by his incompatible colleague, Isogai. Initially, their interactions are strictly business-like, but what happens next...?

(Source: Junet, translated)