まつよいそうじゃなかったです
待宵草じゃなかったです
matsuyoisōjanakattadesu

Noun
Desu Copula

The polite, past negative form of まつよいぐさ

1. Wasn't waiting.; Wasn't staying up.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana