So uh in my head Mafuyu has another truth nuke, very similar to the "what's wrong with wanting validation?" in Ena1. Right after Mizuki comes out:
🎼: ...I see.
🎀: I'm sorry for keeping quiet about this.
🎀: I knew I said I should've said something sooner, but...
❄️: That's not something you have to apologize for.
They hang out in the SEKAI together. They may or may not use the same public bathrooms together. It's not "I'm fine with you" it's "there are no implications of this that bother me." It's one of the craziest lines I've seen in modern media.
(and Mizuki just ignores it because "no I MUST make sure I feel guilty about not opening up earlier" lol)