In 2080, the proportion of children in Japan’s population will be just 0.1%. The youngest members of this shrinking society are guarded like treasures.

Fourteen-year-old Kazushige Sanda leads a sheltered life – at least until his classmate Shiori Fuyumura asks him to admit one thing: That he is Santa Claus reborn. He should use his superpowers to help her find her missing best friend.

All he has to do is put on a red sweater to transform into his true form. Kazushige initially thinks it’s a bad joke, until Shiori Fuyumura pulls out a knife. Because blood also dyes clothes red…

[Source: manga description via Crunchyroll]