Arai Kazuki is a seventeen-year-old high school student who lives alone in a crumbling apartment building, far removed from family or friendship.
Abandoned by his parents and scarred by relentless bullying since kindergarten, Kazuki has built his life around solitude, surviving on part-time jobs and shutting out the world. Social interaction is his greatest fear, and the outside world feels more hostile than comforting.
But everything changes when a clerical error places a new tenant in his small apartment — Sena Ayaka, a cheerful, outspoken, and unusually tall girl from his school year.
Full of energy and warmth, Ayaka is the polar opposite of Kazuki. Where he retreats, she advances. Where he hides, she smiles.
Forced to coexist in close quarters, Kazuki must face the slow unraveling of his emotional walls, and Ayaka may discover that the people who seem most distant are often the ones who understand loneliness best.
Their unexpected cohabitation begins not just a story of awkward mornings and clashing personalities, but a quiet journey of healing, understanding, and maybe—just maybe—love.