nishino is a complete weirdo, literally a rapist and the stories were boring and followed the same storyline every single time: the women don't love nishino, don't even like him, but they fuck and wish they were in love and suddenly they are, though nishino has no redeeming qualities whatsoever and treats women like garbage.
he's a cheater who is always super vague in everything he says and the fact that women keep falling for him is unrealistic imo.
the characters are so bland and the book just feels so misogynistic. also, the guy is in love with his sister and she literally breastfed him when he was already a teenager. 
i get and usually like weird concepts and strange situations, but nishino was simply so unlikable, i hated everything he said and did.
and yet his behavior is portrayed as something normal, or even desirable. horrendous.
also he's such a man-child, crying when he doesn't get what he wants.

the only plus-point is the writing style and format. i fairly enjoyed the short chapters and quick prose.