Class no Daikirai na Joshi to Kekkon suru Koto ni Natta.

- Comedy harem with similar vibes - Main heroine is a tsundere - Both stories revolve around an encounter from the past (childhood) - MC and heroine are forced to be together due they family expectations other notes: - Nisekoi is funnier and more comedy centered, Kurakon is more focused on the MC and heroine relationship - both animes are just partially animated, so if you like them a lot you might need to check out the manga or light novel  

- Main characters from both shows are similar in terms of dynamics; male and female mc's have a competitive rivalry - both female mc's exhibit tsundere-like behavior - style of comedy is somewhat similar 

Both are romance + comedy They are getting married in the 1st episode In both anime the couple lives together  

They have almost nothing in common at the beginning, where they do have more similarities is from the middle. Saito is just as withdrawn as Makoto, who consequently when a girl tries to seduce him he falls into his arms, without establishing clear limits; being someone else's boyfriend. Himari is the cheerful girl who is a faithful friend of the main girl, who at a certain point pretends to be Saito's girlfriend to eliminate gossip, as a "noble" act to help the duo, hiding her true intentions; to lower the boyfriend to her friend, like Sekai. Akane doesn't even know what she wants, so she accepts Himari's help without questioning her intentions, and gets angry with her when she realizes them, just as Kotonoha was angry with Sekai for the same; they share in common not expressing their feelings properly. So they only look a little alike and that's it. read more 

Both deal with marriage in highschool and living together, although Fuufu Ijou is a marriage practical (fake marriage for school). In both they do eventually grow closer as well. 

both stories share the same premise once the deal is set the couple is tossed to live in a house together... quite lucky event... ya of course they pretend not to like each other similar like ranma and akane... but they then the chummy over time