Recommendation: Download the version first. The Japanese voice acting for Ayanokoji (Chiba Shoya) is legendary for its monotone horror.
Depending on your geographic location (specifically in parts of Asia and Europe), Season 1 may be available on Netflix. Download Anime Classroom Of The Elite S1
Season 1 concludes at the end of Volume 3, right after the intense "Island Survival" arc. Recommendation: Download the version first
Season 1 is available here in many regions. Like Crunchyroll, the ad-free plan allows for offline downloads. Download Anime Classroom Of The Elite S1