Watching Classroom of the Elite Season 4 Episode 7

I am a light novel reader for this series and this note includes a spoiler.

I watched the Classroom of the Elite, COTE, season 4, episode 7. It was on the April til the episode 5, and on the episode 7, it got on July. I felt this season skipped a volume from the light novel, but I don't remember what it was even if it was.

Anyhow, in this episode, it's mostly about how 1st grade prepared next exam in an island. I think there were 2 main characters in this episode, Yagami and Housen, and they were contrary. Housen is obviously the main from the 1st year grade but Yagami also tried to group the 1st year together to fight against other years. At least from the acting and character design, he looks smart, kind, and thoughtful person.

The interesting character in the anime is Tsubaki. She was sucking her candy while Ayanokoji and a guy was talking, and suddenly she chewed it and the sound of chewing is loud enough while other 2 guys were talking. Probably going forward, she will always do the same thing as this is her character.