Since when do we have filler in comedy manga when all comedy is 100% filler lol
As long as the chapter funny, it achieve its purpose and this chapter is funny 😄
I'm sure Isagi would mellow out later, heck she's shown it bit and pieces already.
If you want plot, its Komi making new friend which in this arc is the girl running for student council not the love triangle progress.
Read other manga for your drama love triangle fix.