Wait this doesn't make sense.  First Zepar said "we can't form a contract because you don't actually love him, it's just lust", then the next night she's like "Well, this much lust is good enough, lets form a contract".  Make up your GD mind Zepar.  Either lust alone is good enough to form a contact or it is not.  Her equating a person to a manga character does not equal falling in love.