Yoshino's at the end of her rope with her fiance Kirishima, whose secretive actions during their trip back to her hometown of Osaka has come to bad ends. A group of yakuza with the backing of a trust fund baby with his own goals have come to Osaka to take their revenge, and Yoshino's not about to let them. She only has her wits to protect her, but no one can beat her on her own home turf. Meanwhile, the two most dangerous teenagers in the city, Shouma and Kirishima, are destroying everything in their path to clear her way. When all the dust has settled, to the victor goes the spoils. If Kirishima wins, Yoshino has agreed to finally formally start dating him!