This. Is. The best! What an oddball romantic manga. Very realistic and grounded in certain ways. Kanii being a deadpan comedian behind his serious work persona is such a Japanese trope. It's like Gintama or something. The relationship was also really grounded without annoying cliches. The fact that they seriously roleplay in the last chapter feels so honest (and hot tbh). Straight to the favorites!
Garakuta no Ai wo Hitobannjuu