Kirei na Onii-san wa Suki desuka?

Daichi is a college student without clear goals or interests, passing time without direction. He works at a convenience store, where he develops a routine interaction with Nao Akashi, a regular customer. Nao is described as attractive, composed, and well-dressed, embodying an idealized image of adulthood in Daichi’s eyes. After Nao makes a move on Daichi while intoxicated, the two begin a no-strings-attached relationship that lasts for a month. The story involves a young, inexperienced man and an older office worker with a playful side.