Mystari's manga / #Mistaken Identity(1)

After losing his glasses at school, Tachibana Sousuke is helped in the school cafeteria by Kijima Subaru, known as the cursed black cat. However, due to being half-blind, Tachibana ends up mistaking him as a different "Kijima" and starts writing letters to the wrong person. But what he doesn't realize is that the black cat Kijima is actually the one getting these letters, due to Tachibana placing them in the wrong locker. Then one day, the two finally meet face to face... Volume 1, Ch 3-6 Extra: Cat & Dog Love Battle A story about two businessmen who appear to be rivals on the surface but are actually lovers.