Kirepapa.

Both stories revolve around a good looking papa and they are really funny. If you liked Kirepapa, I totally recommend Papa to Kiss in the Dark. 

Yaoi theme. Incest. Pretty papas and sons. A sense of humor. <What more do you expect?> Similarity: *** 

~ OVAs where one is inlove with his father and the other way around. Kirepapa deals with a over protective father hindering any man that make a pass to his son due to its lovable cuteness. Chisato being unaware that his son's classmate Shunsuke have feeling for him complicates things since he thought his Riju was interested in him. Papa to Kiss in the Dark on the other hand is about mutual understanding between father and son. Look incestuous. *shifty eyes* There's also the deal with his father remarrying his co-star that saddens Mira very well. Plus his childhood friend falling in love with him. This ova is more graphic than Kirepapa not certainly for children. Read the manga to know the series better. read more 

Both are to do with beautiful fathers. And both relationships revolve around a son/school boy falling in love with their father. 

both are ova's, both are yaoi, both have a good story nd both have hot charcters ^^ 

Both strangely similar, but strangely the same. Even though both are different in terms of relationship status and such, if you switch the two main Protegés around, you can see the resemblance in character and emotion.  

Papa to Kiss in the Dark and Kirepapa are both shounen-ai (or yaoi, depending on what you consider hardcore). Both animes have a father falling in love with a younger male. 

well.. It's a YAOI anime Means ( BOY X BOY ) If you Don't Like it Then don't watch :p Their similar to each other.. About A Father and son relationship :) Both are cute and sweet to :) If your a Yaoi Fan.. Well This two is Worth to watch ;) 

Both the anime is extremely same. Kirepapa & Papa to kiss in the dark had same story plot, both the anime is about father and son relationship! Both the anime has a hot Father and a cute son, it's Yaoi of course but not Hentai yaoi. If you like Kirepapa/Papa to kiss in the dark, then you will like kirepapa/Papa to kiss in the dark.  

Both are sweet incest-shotacon-boys love ♥ 2 Ovas each~ Mira and Chisato have same seiyuu :B  

Both series are to do with boyxboy relationships. In both series there is a big age difference between the couples. Also if one guy loves the other, the other guy falls back in love with him. 

Both have nice art with great use of color. Both also have very attractive guys and light but enjoyable humor. 

Funny, clever, and cute boys love OVAs with great stories, characters, and animation. And since they were made by the same company at around the same time, they definitely have the same vibe to them.