GENT-169 Doujinshi Pregnancy NTR 500,000 copies sold! Aiming for an unprecedented hit, I drew erotic

Aiming for 500,000 copies, he somehow ends up drawing an erotic manga with a beautiful girl he admires, and while they're discussing it together, something happens in a lucky erotic turn of events, and they become masturbation buddies (using each other's bodies to help each other masturbate). He wonders if they'll end up becoming lovers, and then...