I remember when I was in high school, way back in the 00's, that 'earring only in left ear' was indeed a subtle(?) declaration of homosexuality for men and women. Not sure how widespread it was, or if it was actually true. Kind of amazing to see it in a manga in freaking 2026.
Art is lovely, and I like the yandere slant to it. Felt very 'youthful', where Satsuki's anxiety spirals at the hypothetical that Haru-chan is being taken (or, rather, has already been taken).