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.
| Title | Time | |
|---|---|---|
| 1 | Everything's Bright, Am I Aging? | 2025-10-04 |
| 2 | Candies, Canes, Kisses, and Blades | 2025-10-11 |
| 3 | Charred Fruit Tastes All the Sweeter | 2025-10-18 |
| 4 | Zeus, Smasher of Textbooks | 2025-10-25 |
| 5 | A Typhoon in a Snow Globe | 2025-11-01 |
| 6 | Cyborg vs. Santa Claus | 2025-11-08 |
| 7 | Double-Faced Carnivorous Plant | 2025-11-15 |
| 8 | Love, the Most Selfish Thing There Is | 2025-11-22 |
| 9 | A Fake Flower, Yet Its Roots Rot | 2025-11-29 |
| 10 | You, an Everlasting Moment | 2025-12-06 |
| 11 | Flashback Attack | 2025-12-13 |
| 12 | Pale Blue Pall | 2025-12-20 |
