Office worker (seme) x janitor (uke)
My rating: 8,4/10
FLUFF, OFFICE ROMANCE, SHY UKE, STUTTER
Rokuse, a janitor who struggles with stuttering, admires Takashina, a popular and skilled office worker at the company Rokuse cleans. One day, Rokuse finds Takashina's USB and returns it to him. But because he can't speak, he runs off piquing Takashina's interest. Slowly, the two of them grow closer, while Takashina gets more and more enamoured with Rokuse's kind soul.
Isso Koe ga Nakattara