Since no one did it, I'll tell you, the point in this is a single scene at the beginning, the MC "loses" his girlfriend/wife to a typical black man with a huge penis, BUT that is part of the plot since the MC At that moment he is the typical loser, you can just skip the scene (YES, it is not avoidable since it is part of the plot), and later he takes revenge on the guy and the bitch ex-girlfriend, also those characters are not relevant actually for the plot and other girls will be the MC's "harem".
In conclusion, if you don't like the ntr, you might like this, again later he takes revenge on the guy and you can skip the scene in question. On the other hand if you like ntr, this is not for you since it doesn't focus on that at all.
I hope that clarifies your doubt.