Noa Eikawa, the young heiress of the Eikawa family, suddenly loses her memory one day and forgets everything prior to her student years, as if it were a distant dream. Seeing her innocent state, maid Shiori Tsukada gently draws close, becoming her protector and supporting her through daily life. The two women, close in age, quickly grow intimate, building trust that soon evolves into a romantic relationship. Noa deeply loves Shiori, her feelings growing stronger each day. However, a dark secret from the past threatens their bond—before Noa lost her memory, she had sexually assaulted Shiori. As new emotions emerge and old wounds resurface, the two begin to confront the truth together.