Gaki ni Modotte Yarinaoshi/Turning Back Into a Kid And Starting Over is a two episode ONA released in 2019. Each episode is 19 minutes long. This is an original, no source material.
Ever since he was a kid, women have bullied Boku, which marks him so that he stays stuck in the past and becomes unable to move on with his life. One day, his childhood crush, Kasumi, invites him to her wedding. As he watches everyone around him lead a happy adult life, Boku realizes he has been left behind, causing him to wish he could start his life all over again.
Somehow, this desire comes true, and he ends up traveling back in time to his preteen days. He soon meets Sera Narumiya, his past neighbor, who frequently harassed him throughout his school days. Given an opportunity to redo his life, Boku decides to confront his past problems, but now with the mentality of an adult—this includes, of course, a more sexual approach when dealing with troublesome women.
In the Hentai Gaki ni Modotte Yarinaoshi!!!: There is something everyone thought “If I can return in those days …”, the hero who had trauma in a woman with bullying etc. in the past. One day, the spirit was able to return to “old figure” as “adult”. In that era when I wanted to return not just the figure. The hero who became a demon of revenge will rape revenge one after another with women who caused trauma! When the revenge ends, how the hero is changing how? Besides revenge rape, mischief using the figure of a brat is also tapped! We will achieve all that you want to do when you return to those days !!Studio Selfish announced anime hentai adaptation of the popular manga ” Saki ni Modotte Yarinaoshi!!! | Turning Back Into a Kid and Starting Over!!!”by Maron Maron.
He takes revenge by sexually assaulting Sera and her mother next door… however, he is not yet satisfied…
A protagonist who has difficulty interacting with women because of bullying, has his wish fulfilled of returning to his younger years.
Edit: I’m still searching for the DVD or manga for you pervs. But there’s still the streaming service below.