The core of the anime is that for silly reasons the MC will fall in love with 100 ""girls"" (and have them fall in love with him, conversely) just by looking into their eyes. The reason for this is inconsequential and it's said that if he doesn't make them happy and in love, they'll die (because, why not). All of this is pointless anyway so let's get to the actual issues with the manga.
You might think at first that the manga might be more than what it looks like. It starts off as a parody of harem mangas and harem tropes in general...or so other people would have you think, because to be a parody of something you need to actually subvert expectations and criticise the thing you're being a parody of, not literally do all the possible harem stereotypes and have 4th wall jokes intersparsed in every other chapter. That, frankly speaking, isn't a parody of anything other than the intellectual honesty of the manga's author. So, right off the bat, no, this manga isn't a parody, it's just every single harem trope and nonsensical thing thrown into a pot with an occasional "wow, give the character more than 2 panels!" "blame the manga author GOTTEEEMMM AHAAA" kind of jokes which are 1) about as original as everything else in this manga and 2) get old *really* fast.
I don't want this review to last forever so while there's plenty of issues let's get to the ones that made me drop it:
1) Pedophilia. I have no idea what the average MAL user thinks about this subject but I, for one, am not comfortable with it in the slightest. Played for a one-off joke given specific contexts or you know, not being treated as something that's ok...sure, fine. When you have: a 40-year old trying to have sex with a 14-year old, a 40-year old sexually harassing an 11 year old (and literally anyone in this manga, so long as they're underage), a 24-year old having a relationship with a 14-year old and an 89-year old (in an 8-year old body because suuure) doing the same...yeah, I don't care in the slightest how humorously this is put, I find it plain disgusting. The 14-year old MC french kissing a 10 or 11-year old leads us neatly into the next issue, since that child is also his cousin
2) Incest. Holy fucking mother of incest, the first 10 chapters of this manga alone make the Lannisters look like amateurish buffoons (there's your GoT incest joke, go away). As above, if you're fine with incest in your manga or your media in general when it's very much NOT depicted as something negative or given ample historical or narrative context, you do you (and hopefully your hard drives get checked by the authorities at some point in time) but this manga is nothing but incest. The MC "falls in love" with a girl AND with her mother (because, why wouldn't you) and said mother is one of the most repulsive characters I've had the misfortune to read in a long ass time. Not only will this 40 year old woman make out with her daughter and with her daughter's boyfriend, she'll try to have sex or get her hands on his junk whenever possible and sexually harass anyone in sight (but it's funny because she's cute and has huge tits, know what I mean? Heehee). The MC, as said above, will kiss and be in a relationship with his 11-year old cousin (who is, rather literally, a child, her mental age is akin to that of a 7-year old more so than anything) with the full approval of her father because the MC saved him from being run over years ago (if only they'd both been hit, if only) which is frankly speaking, an incredibly good reason to have your daughter smooch her cousin, that not so?
What made me think "yeah enough" was the MC falling "in love" with a girl and, a few chapters in, with her 89-year old grandmother who is, for laughably boring reasons, inside the body of an 8-year old. When I reached this point, 70-something chapters in, I thought yeah ok, this can't go anywhere but downwards.
Other issues are the usual ones that harem media has, such as the MC being a bland, boring AF, goody two-shoes who somehow is surrounded by ravenously horny girls (and mothers, grandmothers and primary school children in this specific case) while apparently being sworn to chastity. The MC in this manga *really* doesn't work because his whole shtick is "omg my girlfriend is adorable omg I love her so much" repeated for as many new girlfriends he's got by the time you read said line again. Since not a single one of the poor girls has anything more than ONE trait (because, you know, 100 of them) it's basically "toddler pointing at a colour and clapping while laughing" level of commitment and entertainment.
The whole "girl finding out MC has already another (or multiple) girlfriends" could have been fun, except it's an issue only for the first...3, 4 girls, tops, everyone else sees this guy with 20 girlfriends and is like yeah sure, I'm here if you want to wet your whistle you Casanova. I swear, this whole manga has worse writing than fucking School Days, and that's saying something.
Positives? Some art is nice (the first 3 times you see it, it gets repetitive pretty quickly), some jokes land pretty well, some of the "character traits" are funny depending on your tastes (none of them original in the slightest, so not really something you can praise the manga for, realistically speaking) and yeah, cute girls, big boobs, same old same old.
TL;DR
If you like incest, pedophilia, one of the most boring MCs you can find, girls with one character trait that get one or two chapters of focus, corny ass badly written dialogue with an occasional fine joke, you'll love this.
If not, then you'd be better off staying away from this shitshow. Cheers.
