it was a unique bl oneshot of minor character x minor character
isnt that the Harada oneshot where the girl realises she has a supporting role?
no, its one where two minor characters slip out of a drinking party seperately and end up meeting each other.
found it: http://www.mangago.me/read-manga/dame_bl/mh/c012.1/1/
it was a unique bl oneshot of minor character x minor character