Ane Onaho
The protagonist and his friend tried watching an uncensored adult video, but it was a little different from what they expected. They were having fun and asked if they should take a look at his sleeping sister's pussy. Once she falls asleep, she doesn't wake up, so they do whatever they want to her!
(Source: Mujin Comics, translated)
Note: Published in Comic Mugen Tensei 2019-04
