Sentakuya Shin-chan

When one's husband passed away, there will be a sense of loneliness and the thirst for adventure arise. Any man who is in a position to comfort and claim the heart of that person would be foolish not to seize that opportunity.  

-both hentai -both involve a guy that fuck many women -they become his usual sex partners -little bit of bdsm in each -big tits 

- Hot MILF everywhere - One of the MILF has dark skin  

This Show is very similar. Both Sayaka and Chiho have been very depressed over the lost of their beloved husbands that they have blocked love out of their hearts. But two very determined men both look to re-open their hearts and show them they can love again. 

after watched Sentakuya Shin-chan you will notice, ohh the style of animation of the characters ( the faces, bodies,nipples,etc) was a little different of the "regular" style, well "aneki... my sweet elder sister" has that style of animation too ;) 

Both have similar character design and very slutty female MCs (notice the multiple ). Light-hearted plot and somewhat funny plot.