During the summer holidays, Katsuragi arrives at the Tsubaratera household to begin his duties as a butler, honoring the terms of his grandfather’s will. He soon meets Kotoha, the family’s spoiled and headstrong daughter, whose willful personality presents an immediate challenge to his new role. As he settles into the routines of service amid the estate’s refined surroundings, Katsuragi begins to navigate the demands of his position and the dynamics of the household. Their first encounter hints at the adjustments and interactions that will shape his summer.