Akio Wada is the butt of everyone's jokes - Wada fool, Wada punching bag, Wada craven idiot. He has a terminal problem of saying the wrong thing at the wrong time. After swiping a gangster's motorbike, he nearly collides right into a pedestrian, only to be leg kabedon-ed right into a brick wall. She is Misaki Haibara, a known danger to society and former yankee, and somehow, Akio's panic turns into a love confession. But rather than murder him on the spot, she shoots him a look of craving, of utter madness.
Take care, Akio. You've interested her enough to kiss you, stab you, and nurse you back to health.
Thus begins a romance where Akio only needs to fear one person. Leave it to Misaki. She'll take care of the rest.