レトロブームだったら
retoro būmudattara
1. If/when there was a retro boom.; If/when a retro boom happened.
Noun
1. If/when there was a retro boom.; If/when a retro boom happened.
1. if it's the case
1. retro; nostalgic
1. not be found
1. If it comes out; When it comes out
1. If/when topped; If/when crowned
1. If/when shown; If/when I show
1. After; When…passes