It's weird and kinda gross. And tge gun should not go there at all.
If I were to be blunt in giving a warning: This is one messed and twisted Gintoki. Seriously not for the faint of heart
Former 'owner' did rape him in one chapter
The uke only agreed to give a blowjob so technically it is still rape
Brainwashing counts as rape
Chapter 3 has the rape and imprisonment scene. Beautiful sad story with dark edges. Both MCs are broken characters even if uke does not seem to be at first. (though rather than broken more of insecure)
Ao no Exorcist dj - Fill/Kill/Reverse/My Moment