Minato's Laundromat, Vol. 3

Akira Minato is on a brief vacation from running his scruffy old laundromat, needing a mental respite after his former teacher and high school crush, Takayuki Sakuma, took over as Shintarou's homeroom instructor. Haunted by feelings still lingering after over a decade, Akira realizes he'll need to confront his old flame once and for all—if he can work up the courage. Meanwhile, Shintarou's obsession with Akira is consuming his life, and with perceived competition in both Sakuma and Asuka, there's no telling how he'll act…

Volume 3 of the Minato's Laundromat manga series by Sawa Kanzume.