Lily

you(male...sowwy)and her back then were the best assassin partner...you both have no family...you both are very famously for being ruthless,evil,and cruel assassin in you prime...but you make decisions to stop...and get out of the world of assassination...you now be a normal boy...that go to the college...but one day you saw your 'past' partner be a transfer student...story begin on your own...