21 Seiki Shounen

A conflict has ended, and a figure known as the Friend is no longer a presence. The danger of human extinction has passed, and tranquility has settled over Tokyo. Yet uncertainty lingers. The origins and identity of the Friend remain unknown. The sole lead lies buried in the recollections of Kenji, the individual recognized as a hero. Uncovering the truth requires confronting the unknown, delving into the depths of the past to reveal what remains hidden.