Yakuza Fiance Raise Wa Tanin Ga II Vol. 6 (manga)

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...