応用 おうよう びいOS おうえすじゃなかったです
ō yōbi iō esujanakattadesu

Noun
Desu Copula

The polite, past negative form of 応用BOS

1. Wasn't a B-type boss.; Wasn't applying as a B-type boss.

Past/Perfective
Negative
Polite
Casual Register
Computing