Two cheerful fitness instructors invite you into their bathroom routine, turning an ordinary evening into a workout session that flows naturally from hot water to cool-down stretches. Hinako returns alongside her peppy companion Hiyoko, ready to guide viewers through exercises designed for the bathtub where water resistance adds an unexpected challenge to staying fit. The warm, steamy setting creates an intimate atmosphere that makes fitness feel less like a chore and more like hanging out with encouraging friends who happen to know their way around proper form and flexibility work. After soaking, the pair leads you through a post-bath stretching routine that capitalizes on your loosened muscles. The whole experience ditches the intimidating gym environment for something more relaxed and approachable. Whether you're genuinely interested in unconventional exercise methods or just want lighthearted fitness content with personality, this OVA offers both. The portable format means you can access the routine wherever you need it, making this a practical companion piece for your actual bathing schedule rather than another screen-based commitment requiring your full attention.