Yoshino's at the end of her rope with her fiancKirishima, 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.

As Kirishima's birthday approaches he has a favor to ask from Yoshino: there's someone he'd like her to meet. They make a trip to Kirishima's childhood home, a visit with an old relative far overdue. Yoshino finally has an opportunity to learn more about her enigmatic fianc Meanwhile, with the Kirigaya Clan deep in murky conspiracies, the mysterious Azami schemes. When the opportunity arises to get Yoshino on her own, Azami's trap is sprung. An ambush from the shadows has Yoshino-will Kirishima get to her before it's too late?

Ripples travel out from the battle in Osaka, and Renji is none too happy with Shouma and Kirishima for involving his granddaughter. When a fight breaks out, Yoshino grabs a bat and breaks it up. But corporal punishment is not her style, never mind that Kirishima would absolutely take it and beg for more. Kirishima's punishment is a little more subtle, and he repays her consideration by finally opening up about his life. Then, the ripples begin to splash when the yakuza Yoshino and Kirishima fought start to plan their revenge!