Artist's comment:
When I first listened to the ManaRikka duet I was really bothered because Mana is a canonically bad singer!!! Why did she suddenly have a vague idea of what she was doing??? But then it occurred to me that Alice probably owns an entire music studio where they modified her voice to make it sound not terrible because she’s rich and they can do that. Mako-P still suffered though.

Even throughout the screeching session with Mana, I like to think that Rikka had loads of fun singing beside the girl she likes.[/spoiler]