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🔔 Notify me about new seasonsSynopsis
In near-future Japan with ultra-low birthrates, children are treasured but monitored. Santa is banned as dangerous. One snowy December 25th, middle-schooler Kazushige Sanda, descendant of Santa, is attacked by classmate Fuyumura who wants him to find her missing friend, Ono. "Santa, please find my friend." To protect children from adults, Sanda decides to become Santa and fight the adults.
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Episodes
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- E1 Everything's Bright, Am I Aging?Next upOct 4, 2025 · 24 min · ★ 7.3
Synopsis

On a Dec 25 without Christmas, Sanda is attacked by classmate Shiori. Mistaking it for love, he awaits her confession, but hears something else.
- E2 Candies, Canes, Kisses, and BladesOct 11, 2025 · 24 min
Synopsis

Amaya learns Sanda is Santa, restrains him and Shiori to force a kiss. Santa refuses, unlocks sled power to escape. Then Headmaster Oshibu appears!
- E3 Charred Fruit Tastes All the SweeterOct 18, 2025 · 24 min
Synopsis

Sanda gains lie-detecting power. Shiori tries to use it to find Ono, but doubt overwhelms Sanda. Shiori then tells a self-harming lie.
- E4 Zeus, Smasher of TextbooksOct 25, 2025 · 24 min · ★ 6.7
Synopsis

At a funeral, Santa fights Yagiuda but fears his power. His resolve returns, shattering the roof and leaving him exposed before all.
- E5 A Typhoon in a Snow GlobeNov 1, 2025 · 24 min
Synopsis

Sanda vows never to love, but in a typhoon his message to fiancee Niko fails and he's drawn to her. The next day, Yagiuda arrives as a teacher.
- E6 Cyborg vs. Santa ClausNov 8, 2025 · 24 min · ★ 8.3
Synopsis

Santa blocks Headmaster Oshibu from attacking adult Ono, but the enhanced 92-year-old overpowers him. Santa asks the kids for their belief to fight.
- E7 Double-Faced Carnivorous PlantNov 15, 2025 · 24 min
Synopsis

Amaya ends his friendship with Sanda to save him. Meanwhile, the scarred Oshibu, comforted by Yagiuda, turns to Class 10 students who killed adults.
- E8 Love, the Most Selfish Thing There IsNov 22, 2025 · 24 min
Synopsis

Saved from Namatame by Shiori, Santa vows to harden his heart, but when Niko asks for a kiss, Sanda panics and almost transforms before her.
- E9 A Fake Flower, Yet Its Roots RotNov 29, 2025 · 24 min
Synopsis

Tetsudome says Santa lacks grit. With her aid Sanda becomes dark Santa, but doubts himself. After meeting Namatame again, he vows not to fight kids.
Guest stars: Honoka Sakai (Female Student B (voice))
- E10 You, an Everlasting MomentDec 6, 2025 · 24 min
Synopsis

At the Peak of Youth Ceremony, Niko steals Sanda's first kiss at twilight. Meanwhile Yagiuda faces Namatame alone, offering himself as decoy.
- E11 Flashback AttackDec 13, 2025 · 24 min
Synopsis

Namatame wrecks the ceremony. Eating yakisoba, she's met by Sanda in child form. His body starts breaking down as Ono's own changes grow.
Guest stars: Sachie Togin (Female Student (voice))
- E12 Pale Blue PallDec 20, 2025 · 24 min
Synopsis

Santa fights Oshibu before the students. The headmaster thrives on cheers, but Santa regains power by revealing his truth. The duel peaks on the roof.
Guest stars: Kota Yasuhara (Male Student A (voice)), Takaaki Torashima (Male Student B (voice)), Ayumi Sakai (Female Student A (voice)), Minami Kamibayashi (Female Student B (voice)), Haruka Matsudaira (Female Student C (Voice))
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Ayumu Murase
Hiroki Touchi
Umeka Shoji
Anna Nagase
Yuuki Shin
Misato Matsuoka
Toshihiko Seki
Hiroaki Hirata
Masako Nozawa









