Across the bustling veins of central Tokyo, where university halls hum with unspoken stories, a guarded soul finds solace in strings that carry the weight of forgotten summers. Drawn into a web of rediscovered promises and unexpected fractures—a sister's hidden scars, a friend's desperate race, and the lingering touch of a face from a distant hill—he grapples with the cost of trust in a city that never sleeps. As echoes of playground vows collide with the roar of engines and the sting of betrayal, will the quiet notes of connection outlast the silence of doubt?