オプショナルパーツじゃありません
opushonaru pātsujārimasen
1. Not an optional part.; It is not optional.
Noun
#374541
1. Not an optional part.; It is not optional.
1. part; component
1. (common) cold; influenza
1. snake
2. serpent; large snake
1. then; well
1. hedge
1. journal; log
1. believer; adherent
2. fanboy; fanatic