Yeah, that’s a pretty shitty thing to do to your sister. Hiiragi owes Tsubaki a pretty massive apology. I could be mistaken, but it looks like Tsubaki passed on the elite school too (unless that’s the one that they’re at but seems not to be given Yokoe’s study habits). So she kept her sister from attending a better school, even though she was secretly taking an additional exam anyways, so why bother? Also, can’t believe the parents allowed that too. I always wondered what the beef was between the two, but didn’t think it would be Hiiragi acting out because she felt inferior to her sister. Damn.
Honestly, I hope Tsubaki can learn and grow from Yotsuba and the others and realize that it wasn’t all on her. Make Hiiragi realize she screwed up and is missing out on her sister’s presence because of her actions.
I hope Hiiragi can also grow with the friend that she has, they honestly both probably needed to branch out a bit but no reason to hurt each other in the process.