A little OT but, these last chapters reminded me why I normally hate the sœur system: it's a very heteronormative way of dealing with yuri relationships. It denies girls romantic feeling and forces them into a pseudo-sisterhood that's supposed to last until graduation.
In the end, it's just a cheap way of making a yuri story without actually committing to it.
I'm so glad these kinda stuff got phased out in the years and nowadays we can have ACTUAL sapphic love represented.
/ Boomer rant over.