https://www.animenewsnetwork.com/new...n-2023/.186325
Confirmed for 2024. Here’s a recap of the order of the series.
Kumiko’s 1st year is covered in 3 novel volumes plus 1 short story volume. Season 1 anime covers the first volume and some parts from the short story volume. Season 2 covers the second and third volumes. Each season got a movie version.
Kumiko’s 2nd year is covered in 2 novel volumes but only one of them focuses on Kumiko while the other focuses on Mizore and Nozomi. A movie based on Mizore and Nozomi volume and then another one based on Kumiko volume were released. There is a short story volume that mostly take place during the 2nd year and one of the stories will be adapted into OVA or short movie that will be released in 2023.
Kumiko’s 3rd year is covered in 2 novel volumes which Season 3 will adapt.