I Shall Survive Using Potions (Manga) Volume 9 (manga)

With yet another adventure behind her, Kaoru sets out to unwind for the day with her staff and their beloved steeds...until she learns of the perfect crime, straight from the horse's mouth! So it goes that the angel must bring a usurper to justice with the help of a set of four-legged whistleblowers. Kaoru will keep on surviving...for a hot springs trip?