The uke is in need of money so he sells his body for it then I think when he was on his way home he had an encounter with a yakuza. The yakuza took care of him? Then he met a guy who wants to hire him to kill the yakuza, he accepted the medicine (I think to kill the yakuza, gosh, really can't remember it clearly) but in the end he didn't do it because he realized that he likes the yakuza. The uke became a yakuza also and continues the relationship with the seme. (▰˘◡˘▰)
I'm kinda bad in giving the summary of the story huhu, but the manga is really good. I really want to find this manga ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄
Why the end tho????? You can't be possibly serious, right? I still want to know if ever they get official. Or is it possible that the author is going to give us another story? If that's the case, please, pretend what I said above is not here
They never say directly that they do get together, by "leash" they're referring to him finally asking her to be in an exclusive relationship, so yes they do get together