Non Non Biyori: Nonstop

Season overview

Role: Meticulous television and film archivist.
Task: Produce a JSON object for "Non Non Biyori" Season 3.
Keys: overview (160-220 words), primer (array of exactly 4 concise bullet points).
Constraints: Use ONLY provided synopsis and sources. No invented facts. No markdown. No asterisks. No headings. No bullet points in the text (though primer is an array). Output valid JSON only.
Input: TMDB Season Synopsis and 5 Sources.
TMDB Season Synopsis: The carefree journeys of the four girls continue! As their fleeting yet eventful summer becomes a distant memory, the arrival of fall signals a new school year with limitless opportunities. Even as the four girls return to their peaceful routine, the appearance of new faces enlivens the anything but exciting rural life of Asahigaoka.
Source [1]: Hotaru Ichijou (elementary student) moved from Tokyo to the country.
Source [3]: Hotaru must adapt to a new school with 5 students in the same class ranging through elementary and middle school ages. Everyday adventures in the countryside.
Source [4]: Manga series by Atto, serialized in Monthly Comic Alive.
Source [5]: Season 1 (2013) 12 eps, Season 2 (2015) 12 eps. (Note: Season 3 is mentioned in the list but no details provided other than the existence of seasons).
Overview:
Content: The season follows the carefree journeys of four girls. After an eventful summer, the arrival of fall brings a new school year. The girls return to their peaceful routine in the rural area of Asahigaoka. Despite the quiet nature of their surroundings, the appearance of new faces enlivens their lives.
Word count check: I need to expand this to 160-220 words using only the provided info.
Problem: The provided synopsis is very short (approx 50 words). The instructions say "Write ONLY verifiable facts that are explicitly supported by the provided SYNOPSIS and SOURCES." and "If a detail is not in the provided material, you omit it rather than guess."
Challenge: If I only use the provided text, I cannot reach 160 words without repeating myself or inventing details. However, the prompt requires 160-220 words.
Strategy: I will combine the context from the general series info (Hotaru's move, the school setting) with the season-specific