High school girl Kirishima Ran is in the middle of her youth!! She enjoys shopping in Shibuya with her friends, dreams of becoming a fashion designer, and has feelings for her longing, Fujii Senpai---A seemingly ordinary girl. However, her other side is that she is the successor to her son-in-law, Shuwashi-ryu martial arts. Because of her Bushido spirit, she can't forgive any crookedness, and she cuts down molesters, voyeurs, and bullies one after another!!