愚兄 ぐけい賢弟 けんていじゃありませんでした
gukeikenteijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 愚兄賢弟

1. I was not your foolish older brother, nor your wise younger brother.

Past/Perfective
Negative
Polite
Terminal Form