女子 じょし高等 こうとう学校 がっこうだったら
joshikōtōgakkōdattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 女子高等学校

1. If/when [it is] a girls' high school; If [she/one] were a high school girl

Tara Conditional