The original song is the Stage 3 theme from the PC-98 title, Lotus Land Story.

It is I!

BAD Apple!! is famous for the shadow animation

Speaking of Lotus Land Story Stage 3...

Elly

She is in the shadow animation

It wouldn't be an exaggeration to say this is basically my signature song...

Hmm? What is it?

The Stage 3 midboss claims that because (Bad Apple!!) is the Stage 3 theme, the song actually belongs to it.

Well, that's it.