Since this 1 on 1 forum takes all kinds of 1 on 1 like fights, master/slave, yaoi/yuri.
Then I think it should be where after you put the title of what you will call the 1 on 1 rp then put what it is in parentheses.

EX:
Vampire kisses (yuri)

haha of course since its 1 on 1 its only 2 people in each 1on1..but that's kinda obvious x)
well urrmm so yeah..bye :3