HifuAzu defending their status as the main couple.
Azusa grabbing her sweater is so adorable.
The anime could do eden treaty without sensei if they make Hifumi the protagonist, they just make the first episode the bank heist and Nagisa puts Hifumi in charge of the club the rest of the season. Sensei would be needed for the final part of the treaty, but they can just adapt the first 3 parts until the point Hifumi gives her speech.