Because in a world of Monster Musume, and more and more outrageously sexualized anime, Nisekoi mostly just relies on gags and actually, yknow, liking the characters as people in often hilarious relationships.
The main problem with nisekoi, the romance is the best point and the gag usually is the filler and some of the gag is kinda dry. If u want some good gag manga with minimum sexual pics, i suggest u this manga.^~^
Bit of a sidenote but do we know if they plan on adding some more actual content to the game apart from costumes? I'm still waiting on some more themes and enemies for instance (and never cared much for the meme-heavy costumes that have nothing to do with Mario honestly).
I've seen part of that series, and know it's one of my younger brother's favorite romance animes (but not favorite overall). I don't know who he thinks best girl is, but from what I saw, for me it wouldn't be her.
I knew what I meant, but I'm terrible with names. Edited to say Nisekoi, it's what I meant since I know they've done weird crossover manga, crossover art, costume swapping, weird cameo appearances in things, and the like.