I don't really understand what the Manga trying to say.
1. He said something about his having vision with Parallel world where he was a girl aka the selfcest when they actually did it.
2. But then again last few pages were about him taking a Pills (assuming it's somehow a TS pills?) Where he'll became a girl and get visited by another timeline of him when he was a man to fuck himself.
3. But that doesn't make sense as the girl he fucked can't even believe that there's a male version oh her
No damn idea lol.
Likewise, what the fuck was that.