[Mizuyoukan] Happening STAR (All chapters + Milky Mate & Sweet Panic) [Ongoing]

A vibrant tale of friendship and unexpected sensations begins when two close companions find themselves caught in a whirlwind of sensory surprises. As a casual day of relaxation transitions into an intense session of intense physical training, the duo navigates a series of surprising sensations that challenge their control. From playful moments to sudden, overwhelming waves of pleasure, the story follows their journey as they discover new ways to experience and manage their mounting desires.