少年 しょうねん だんだったら
shōnenda ndattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 少年団

1. If/when [I/he/she/it/we/they] were a Boy Scout/member of the youth group.; If/when [I/he/she/it/we/they] were young.

Tara Conditional