Hmmm, if tsubame actually likes Yu then I suppose there's some amount of character development and over the top convoluted interactions that could maybe redeem her. That being said, if it were me I wouldn't even be friends with her.
This chapter should have been the conclusion of the third season, they should've made it 16 episodes, had the culture festival confession on the 10th, then the last 6 for 138-160