Excuse me buddy i think you got the wrong song.

Here we have the moment Uta Komagawa remembers that she's a crazy psycho bitch and her world starts collapsing, powered by this powerful engaging song that usually plays when talking about the laundry and cooking and shit.
Someone fucked up big time.

[@luook3]

The music is to make up the creepy atmosphere, since past Uta is delighted by that memory, the music gets more corrupted as present Uta remembers.