13 As a child, Mondo Fujieda reached out to a quiet, solitary girl named Izayo Gorugo. Rumored to have a family of assassins, everyone believed Izayo to be a weird liar, except Mondo; so one day on a field trip, he offered her a piece of candy – a piece of candy which promptly caused her to vomit. Swearing to kill him one day, Izayo moved away; and over the years, Mondo became a proper delinquent. Now, in high school, Mondo is surprised to see Izayo back in his life as a transfer student – and she’s ready and willing to make good on her promise. With a gang of thugs to back him up, Mondo will do whatever it takes to keep his life intact, much to his dismay!