Ero Goods! H na Omocha de Kaikan Enjoy♡♥

The guy's bedroom shelf is lined with onaholes he calls his "waifus," and he insists talking to sex toys at his favorite shop isn't cheating on them, it's just business. That business becomes literal when the female president of SiVA, a major sex toy manufacturer, hires him on the spot after one conversation, no interview, no second thoughts.

His new job in commodity research means quality-checking every product SiVA develops and studying competitors' toys through hands-on use, then reporting back to Planning and Development. The catch is that the department is staffed almost entirely by women: a widowed section chief, a tsundere junior researcher his own age, a cool senior director, and they all take part in the product testing right alongside him.

The loop follows that setup directly, working through toy after toy with his coworkers as test partners, with the story branching toward multiple endings depending on how those research sessions go.