create a skill with a single target, and figure out your damage calculation formula, then before that add
$game_variables = b.enemy_id;
before it, this will set game variable 1 (you can change it) to the number of the enemy in the database
then add a trait to call a common event
the common event ought to look like this
using yanflys custom battle command script, you could even replace the normal attack with this skill...
if you want enemies to kiss you i think youd need to duplicate the skill and use a.enemy_id instead, untested though. the alternative to that is making a different kiss with its own custom event for each enemy