I know it isn't Ookumo-chan Flashback so please no one say it as an answer. It is just as crazy though. Now, this manga is about a MC trying to get with his mother. His mother in the present have turn into bread shape. I think in the first chapter he goes back in time and meets his younger mother and father. He punches his younger father in the face to stop a date i think. I just know he punches his father in the face.
I have to mirror this post. What? Like, this plot is if Back To The Future had Marty deliberately try to seduce his mom. Again, what? Edit: You dick, the way you phrased the summary made me think Japan went further into depravity. The MC tries to change the past so his mom becomes an idol instead of ending up with his father. In process he ends up in love with Hanada ( another idol)