Kimi no Koto ga Daidaidaidaidaisuki na 100-nin no Kanojo

Fun harem that doesn't take itself seriously, very entertaining & absurd. 

Both animes involve polygamy where the guy chooses to date the girls rather than pretend to like them. Both are comedic and do not take most things seriously. If you liked Girlfriend, Girlfriend then you'll probably like the 100 girlfriends. 

Both shows are hilarious harem romcom about a high school boy who has more than 1 girlfriend. If you like one of these, you might enjoy the other one. 

Legendary Protagonists who are really all about that harem life and Seriously/Earnestly love their girlfriends. 

dumpster fire harem that instead of being mad about it, you'd have no time to think about how shitty everything is because, SOMEHOW, the schticks are actually funny. the male MC is also v stupidly adamant about making his girls happy 

Both series involve harem elements and explore polyamorous relationships. In their own retarded ways which is always about COMEDY. 

In a genre with so much will they won't they, it can be refreshing to have a main character who is already in a relationship. Both series feature absolute chad MC's---male main characters who have a funny, endearing, and loving personality which warrants the absurd amount of love they receive. Thanks to their main characters, both shows are significantly funnier than any other in the harem romcom genre, and though each character may be deranged, they at least act in ways which are consistent with their version of derangement. 

both protagonist are famous two timers at the first episode. 

A "Shonen Jump" like answer to twgok/kaminomi.100 kanojo directly references twgok's setup,but if you watch series like one piece,DBZ and others of the type,you know how the harem lead, approaches his 100 girl conquest. Where Keima from twgok is is cool smart,handsome and calculating,Retarou of 100 kanojo relies on his sheer shonen determination to keep the girls happy. 

Similar vibe, similar heroines, protagonist getting girls to save them and to save the world... 

-Both are polyamory romance. -Girls are happy with the relationship in both of them -Both have kind MCs(not saying if MCs are good or not, but they are kind) -Both have thoughtful MCs -Both have very cute girls 😍