A 17-year-old professional shogi player living alone is drowning, not from failure but from the weight of existing without anyone to witness it. The show doesn't fix him with victories or epiphanies, it just lets you watch him slowly learn that loneliness is survivable when someone chooses to stay anyway. Shaft's animation transforms every quiet moment into something you feel in your chest, and the score understands grief before the dialogue does.

Seventeen year old Rei Kiriyama lives alone in Tokyo, supporting himself through professional Shogi matches. On the surface, he's independent. Beneath that facade, he's emotionally adrift: his adoptive family relationship is fractured, he can't connect with peers at school, and his competitive career has stalled into a frustrating plateau. Then he meets the Kawamoto family. Three sisters, a modest household, and a warmth that stands in sharp contrast to Rei's isolated existence. They invite him in not as a curiosity but as someone who belongs, and something in him starts to shift. What unfolds is as much about the quiet work of rebuilding yourself as it is about competition. Shogi stays at the center of Rei's life, but his harder struggle is learning to connect with others, accept the care offered to him, and make sense of his own tangled feelings. This is a show about loneliness and connection, about how family forms in unexpected ways, and about the slow, unglamorous process of healing.