We're Not Cut Out to Be Lovers, Volume 1 by Kou Hirokawa

The neighbour of the silent mechanic Kumazawa is Koichi, a streamer who broadcasts about love stories. Koichi is as friendly as a Shiba Inu, and he quickly finds his way into the heart of the tough-looking Kumazawa, unconsciously inviting him. 'Don't test my patience any more.'His unconscious, natural rampage seems likely to burn out the rationality of a sensible person...!?
Binding: Paperback / softback