Before love could bloom, a brother’s tragedy left scars that shaped everything.
A poignant side story to MARS, this volume explores the past of Rei Kashino’s late twin brother, Sei. Told through the perspective of Kira and Rei, the narrative sheds light on Sei’s struggles, secrets, and tragic fate. It’s a deeply emotional companion piece that expands the world of MARS, offering fans greater understanding of the shadows that shaped Rei’s pain—and his search for love and healing.