honestly the entire narrative and story is a mess, but what's even worst is how vague the magic system is. Sure the author uses the singing magic as a plot device to make/solve drama but damn, it just doesn't make sense at all!
I mean, you literally created a magic system where you just "wish hard enough + sing it out" and boom you have done magic. That's fucking insane, what's stopping people from using it for evil means?? Ugh I just hate how stupid this magic thing is.
Whilst the narrative could've been clearer (I'm still not sure what spell Maki cast on herself and what Maika did to make herself a...ghost I think?)
I think Maki wanted to be like the little mermaid, so she casted a spell while she was on stage to disappear (kill herself)?. And the spell was activating in last part of chapter 6, but Maika-senpai intervened with her spell so she switched the target of the spell to her. That's why Maika-senpai is the one who disappeared.
We see that in the future when Maki's a successful actor, Maika-senpai is still there in her ghost/transparent form and she doesn't age at all, so I'm guessing she did die and that's just her ghost lingering. Though if that's the case that's fucking dark ngl.
thanks for doing this series but damn, this is so disappointing & such a waste of a good premise.