[DISC] Mayonaka Heart Tune / Tune In to the Midnight Heart

I’ve been catching up on Mayonaka Heart Tune and I can't stop overthinking who Apollo actually is.

Every time I feel like I've locked in a guess, I end up switching my mind a chapter later:

• Shinobu: Her focus on becoming a professional announcer gives her a solid case, but she plays her cards so close to her chest that it’s hard to tell what’s a genuine slip-up versus a misdirection.

• Rikka: She has a ton of thematic flags going for her, though part of me wonders if the author is deliberately laying it on thick to throw us off.

• Nene / Iko: They feel more like dark horses right now, but knowing how these mystery-harem series play out, a surprise twist is never off the table.

• Shared Mantle: There's also the wild-card possibility that Apollo wasn't just a single person, but a team project they worked on without realizing the full picture yet.

Who’s your main lock right now? Are there any specific small details or background panels you think most readers missed?