しゅ系列 けいれつ ほしじゃなかったです
shu keiretsuhoshijanakattadesu

Noun
Desu Copula

The polite, past negative form of 主系列星

1. Wasn't a main series star.; Wasn't part of the main series.

Past/Perfective
Negative
Polite
Casual Register
Astronomy