Saikin, Imouto no Yousu ga Chotto Okashiinda ga.

Comedy, ecchi, soft romance and a kind of incest; it's all about imouto. OniAi: harem (girls like/love the protagonist, somehow). ImoCho: supernatural (the main character's "sister" is possessed by a perv angel/ghost that loves the MC). 

Both are about a relationship between an older brother and a little sister. At first, in both, the sisters hate their brothers but after some (or maybe a lot) situations, they end up loving them. 

Kiss x Sis and ImoCyo share the brother/sister romance and are extremely ecchi. ImoCyo's main character is somewhat forced into trying to seduce her brother, versus in Kiss x Sis the girls are all for it. If you're looking for a fan service galore-type show then I would recommend the other to you to give a try. 

Not-blood-related incest series in which the step-siblings' recently married parents aren't around to get in the way. The sister is initially apathetic towards her brother, but events take them from "strangers who happen to live together" to an actual family and potentially lovers... assuming one of the other haremettes doesn't steal him away. Of course, these events tend to be shamelessly lewd: Eromanga pushing the boundaries of what vanilla fanservice means, and ImoCho basically putting the hapless sister through a new fetish every episode. 

if you ignore the ecchi, the storyline is quite similar both female character are forced to flirt by a cupid-like character romantic killer is with ikemen and saikin imouto is with her brother 

A slice-of-life comedy about growing up with family and childhood friends with a supernatural twist. Mikakunin completely lacks the Ecchi component and has more slap-stick moments. Both series have a large cast of wholesome likeable characters. Both feature love interests that live in the same house. Both anime are about a shy main character learning to be more confident in themselves. 

Both shows present girls having trouble with her brother 

Main heroine is non-confident girl with "father" problems Accidentally, she changes in mythical way (possessed by ghost / becomes zombie) Male lead try care about her, they live in the same house Energetic childhood friend inclining in their romantic development Despite supenatural state, main heroine tries her best to live like normal human, that leads to comedy, drama and (ofcourse) ecchi 

Both girls have to face some funny or troublesome situations regarding the opposite sex. 

Both have a step-sister, but in Onee-chan ga Kita, the step-sister is clingy to the main protagonist, unlike in ImoCho, where she is kind of shy toward her step-brother. 

Both are about a supernatural being (a god of misfortune in "Binbougami ga!" and a ghost in ImoCho) causing mischief in the lives of the girls they "haunt." Differences: Binbougami ga! is not ecchi (there are some moments, but it is not a central part of the series). Binbougami ga! is a parody/gag anime, whereas ImoCho tries to be a romantic comedy. I think Binbougami ga! is funnier. 

Just another little-sister-love-big-brother incest, plus both are step-siblings. and in this case, the ImoCho little sister is being possessed by a ghost who love the big brother, while Onisuki little sister wants to fall in love and marry the big brother. 

Both series are about a girl who has been possessed by a spirit who had died recently and couldn't approach the heavens until some conditions were done. 

mitsuki and Ririchiyo have similar face, the main character guy always care about the main character girl, both mitsuki and Ririchiyo doesn't really like to talk in the beginning 

Both anime are about a female ghost fulfilling their desire /unfinished business in this world so they can go to heaven. Both have romance. Happy ending and also similar ending situation.