The Clone Returns Home

In a near-future Japan where cloning technology has advanced, astronaut Kohei Takahara is resurrected as a clone after dying in the line of duty. However, contrary to scientists' expectations, he reverts to his childhood memories when his twin brother drowned, sacrificing his life for Kohei. The clone discovers the body of his former self and mistakenly believes it's his deceased twin, leading him on a journey back to his hometown where he lived with his now-dead mother.