In the competitive world of professional shogi, a young prodigy struggles to find his place. Kengo Kawanishi voices Rei Kiriyama, a 17-year-old genius who has climbed the ranks to become a professional player, yet feels utterly isolated and disconnected from the world around him. Living alone in a stark apartment, Rei's life is a quiet battle against depression and self-doubt, his only solace found on the shogi board. His existence takes an unexpected turn when he meets the three spirited Kawamoto sisters—Akari, Hinata, and Momo—who welcome him into their warm and chaotic home with open arms. As Rei navigates the intense pressure of his matches and the complex rivalries with fellow players, he begins to learn that true strength lies not just in winning, but in allowing himself to be vulnerable and to connect with others. This poignant and beautifully crafted anime is a heartfelt exploration of loneliness, healing, and the quiet power of human kindness, blending the cerebral intensity of competitive gaming with deeply emotional character drama.