The Case of the Sandbox Murder at Dawn

One-shot of the Ron Kamonohashi: Deranged Detective manga. It was initially published as a re-release of the oneshot in the Weekly Shōnen Jump #10, 2021 (Feb 8 on print and Feb 21 digitally)

Received a proper title upon its tankōbon re-release in Volume 3; "The Case of the Sandbox Murder at Dawn".