One day, Chizuru and Mioto enter problem-solving office Kurogarasu. The two girls look naive, but Chizuru is a leader of a enjo kosai group. Their group makes money by having young girls date older men for money. Thugs are threatening Chizuru for money. Chizuru pays 2.5 million yen to the problem-solving office Kurogarasu for their help. Kuroto, Yuya, and Hina take the case and begin to investigate the thugs, but they find something unexpected. (Source: AsianWiki)Edit Translation