Mirai

줄거리

Four-year-old Kun Oota, an only child, lives a spoiled life with his parents and the family dog, Yukko. His world is disrupted by the arrival of his new baby sister, Mirai, who becomes the focus of his parents' attention. Kun struggles to adapt to this change, feeling neglected and throwing tantrums. However, a teenage girl appears, claiming to be his sister from the future, hinting at a deeper connection to his new sibling.