Sayuri Kurata, a third-year high school student, radiates kindness and politeness through her formal speech, a reflection of her strict upbringing and guarded emotions. Hailing from wealth, her cheerful facade is punctuated by a unique laugh and the curious habit of self-referencing in third person—a linguistic shield forged from childhood trauma. Her younger brother Kazuya’s terminal illness and developmental challenges led her to enforce harsh discipline, believing it protective. His death plunged her into guilt-ridden despair, culminating in a suicide attempt that scarred her wrist and severed her emotional ties to the past, cementing her third-person narrative as a means of detachment.

A transformative friendship with reserved classmate Mai Kawasumi anchors Sayuri’s journey. She becomes Mai’s steadfast ally, crafting daily lunches and gradually welcoming protagonist Yuichi Aizawa into their circle. Her loyalty shines when she reclaims her student council presidency to reverse Mai’s expulsion, deftly wielding her social clout without bitterness toward adversaries. This resilience extends to enduring supernatural attacks tied to Mai’s struggles, from which she ultimately heals, graduating alongside her friend.

Within the visual novel’s supplemental route—unlocked after Mai’s main story—Sayuri confronts her guilt, culminating in a hidden ending where playful lunches with Mai and Yuichi hint at her loosening self-imposed rigidity. Though entwined with Mai’s arc, her narrative carves its own path, emphasizing self-forgiveness and the redemptive power of bonds. Through familial loss and gradual emotional renewal, she emerges as a cornerstone of the story’s meditation on trauma, illustrating how quiet strength and companionship can mend fractured spirits.