Kamen Rider: Build

Season overview

Topic: "Kamen Rider" Season 28.
Constraints: Use ONLY provided SYNOPSIS and SOURCES. No invention of titles, names, dates, etc.
Output Format: Valid JSON only. No markdown, no asterisks, no headings, no bullet points (except within the array for the 'primer' key, though the prompt says "array of exactly 4 concise bullet points", I should interpret this as an array of 4 strings).
JSON Keys:
overview: 160-220 word factual summary.
primer: Array of exactly 4 concise strings summarizing essential previous lore/stakes.
Source Content:
Synopsis: 10 years after Pandora's Box disaster divided Japan into three separate nations, unidentified lifeforms called 'SMASH' have appeared. To fight them, a prodigy physicist with no memory utilises the Full Bottles to transform himself. This man is Sento Kiryu, Kamen Rider Build.
Source [1]: Mentions Takeshi Hongo (from 1971 series, likely irrelevant to the specific "Season 28" context provided in the synopsis, but I must be careful). The synopsis provided is clearly for the "Build" era/season.
Content: 10 years after the Pandora's Box disaster, Japan is divided into three separate nations. Unidentified lifeforms known as SMASH have appeared. Sento Kiryu, a prodigy physicist who has no memory, uses Full Bottles to transform into Kamen Rider Build to fight these lifeforms.
Word Count Check:
"Ten years have passed since the Pandora's Box disaster, an event that resulted in the division of Japan into three separate nations. In the wake of this catastrophe, unidentified lifeforms known as SMASH have begun to appear. To combat the threat posed by these entities, a man named Sento Kiryu utilizes Full Bottles to transform into Kamen Rider Build. Kiryu is a prodigy physicist, though he currently possesses no memory of his past. As the SMASH continue to emerge, the struggle to defend against these unknown lifeforms defines the current landscape of the divided country. The narrative follows Kiryu's efforts to fight these creatures using his unique abilities and the technology of the Full Bottles amidst the geopolitical fragmentation caused by the previous disaster."
Word Count Calculation:
1. Ten 2. years 3. have 4. passed 5. since 6. the 7. Pandora's 8. Box 9. disaster, 10. an 11. event 12. that 13. resulted 14. in 15. the 16. division 17.