白襟 しろえりマンガベイではありませんでした
shiroerimangabeidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 白襟マンガベイ

1. Was not a white-collar manga bay.; Was not a white-collar manga enthusiast.

Past/Perfective
Negative
Polite
Formal Register