Ane Koi: Suki Kirai Daisuki.

First Love is a 3 Episode OVA with 3 Differences love story If you like sibling relationships ( like in 1 eps of first love ). I recommend you watch this. where they have in common, namely a love story between siblings 

Both hentai feature purple haired tsunderes as the main love interests over the course of 2 episodes. Both characters show evolving traits as the series moves into the second episode. And of course, both male boys are dense as fuck. I'd defiantly recommend both hentai as they are some of the best in terms of art, story and characters! 

Incestuous stories where the MC loves their biological older sister and have sexy time with them. And both stories were created by the same person so expect the same quality vanilla wincest.