Shun arrives at the secluded Water School, a tranquil haven nestled in the forest beside a shimmering lake, and assumes his role as its sole male teacher. He quickly encounters several students who have retreated from the world, each carrying deep emotional wounds, self-doubt, and lingering past traumas. Through quiet, attentive interactions, he begins offering the steady support needed to help them rediscover confidence and take their first steps toward recovery.