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In a futuristic Japan plagued by declining birthrates and climate catastrophe, society strictly controls children, enforcing extreme adult supervision while outlawing winter festivities. Sanda is a seemingly ordinary middle school boy who hides a strange physiological lineage. When a quirky classmate named Fuyumura pierces him with an iron stake, Sanda's bloodline awakens, physically transforming him into the legendary muscular powerhouse Santa Claus. Blessed with immense strength and superhuman agility whenever he wears red, Sanda finds himself fighting ruthless authoritarian administrators and corrupt black-market forces to protect endangered children and resurrect forgotten childhood wonder.
⚠ Background — may contain spoilers
Science SARU produced this dynamic television anime adaptation based on the visionary manga series created by Paru Itagaki, the renowned author of *Beastars*. Slated for broadcast in 2025, the anime was officially announced following the conclusion of the manga's run in Akita Shoten's *Weekly Shounen Champion*. Studio Science SARU brought their signature fluid animation style, expressive character acting, and kinetic draftsmanship to the production. The series earned significant intrigue for its bizarre premise, combining dystopian social satire, intense hand-to-hand martial combat, and holiday folklore into a daring coming-of-age action adventure.
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Trailer
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Episodes
12
1
Everything's Bright, Am I Aging?
Aired 2025-10-03
2
Candies, Canes, Kisses, and Blades
Aired 2025-10-10
3
Charred Fruit Tastes All the Sweeter
Aired 2025-10-17
4
Zeus, Smasher of Textbooks
Aired 2025-10-24
5
A Typhoon in a Snow Globe
Aired 2025-10-31
6
Cyborg vs. Santa Claus
Aired 2025-11-07
7
Double-Faced Carnivorous Plant
Aired 2025-11-14
8
Love, the Most Selfish Thing There Is
Aired 2025-11-21
