Ashita Sekai ga Owaru nara Comic
Aka to Kuro: Ashita Sekai ga Owaru nara / Aka to Kuro dj - Ashita Sekai ga Owaru nara / If the World Ends Tomorrow / Если завтра никогда не наступит / 明日世界が終わるなら
Completed Released: 2018

A short story of Yamato's parents and Yukio's dad. *Note: Released at J.GARDEN 45.*