Everyone sees the student council president Mitarai Keiko as the perfect girl, but what they don’t know is that her favorite thing in the world is performing fellatio on her younger brother Noboru. With their parents always traveling, they fulfill this desire quite often and in rather adventurous ways.. 
 
(Source: Nekopoi and Has Been Translated and Edited)

One day, Taro finds a next-gen sex doll that looks just like a woman he fancies and buys it. When it arrives he quickly switches it and notices it gives an error! He was already horny and about to explode! He uses the sex doll, Naoko, before getting it fixed, and he can't help but to cum inside its mouth! He cums several times in its' mouth! With a sex doll that can't be fixed now... 
 
(Source: Coolmic)

1-6. Futari Shitei wa Fela Pure (Two Siblings' Fela Pure) 
7. Mitari Ryuu Oral Care (Mitarai Style Oral Care)

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