I have, like I have read Chikan Otoko (same author, CO is based off an (apparently) real story).
I'd say OMK is a good read but it's way overrated because of the Broccoli meme (nonsense out of left field for massive shock value, felt the same way for the girl Kurosawa ended up with, a la "life is unpredictable amirite"). Chikan Otoko is a smoother read, it's got its weird stuff (like the MC's
living onahole), there's drama but doesn't feel
.