This is just my theory. After being drugged, Uke obsessed or addicted to the play he's having with his boss/sponsor and he sought out Seme for a sex since the sponsor will just do some play and not some sex.
Oh okay so Derek's friend is Brandon's Ancestor ? Haha Same hair colour and Brandon saw Uriel when he was a kid.
This is just my theory.
After being drugged, Uke obsessed or addicted to the play he's having with his boss/sponsor and he sought out Seme for a sex since the sponsor will just do some play and not some sex.