The first rule of Lewd Town: Don't take anything too seriously.
The second rule of Lewd Town: Not everyone is perfect, so don't expect perfection in the MC or the girls.
The third rule of Lewd Town: If you skip talking with any of the 30 or so love interests/journal characters, it could lock you out of some story for the ones you really pay attention to.
There are many, many VNs with handsome MCs, even more that use a generic default (identical) MC model in their games.
The answer lies in googling both "Leisure Suit Larry" and "Monkey D. Luffy"... The MC is modeled physically and emotionally after the best (and worst) aspects of both those characters.
Considering what he went through, there's only so much even the best cosmetic surgeon in the world can do to make him presentable.
And always remember the FIRST RULE of Lewd Town.
Glad you're enjoying it.