Mother Saori and her son Shinkurou share a forbidden bond as blood relatives. In a situation far removed from their everyday lives, the intense emotions between them erupt uncontrollably, driving them to a hot spring resort. Bathed in the summer sunlight and surrounded by lush greenery, their passion continues to rise. An energy, quiet yet pulsing like nature itself, envelops the two. Within this atmosphere, overwhelming desire swirls between them, forging a new, deeper connection.