I am absolutely sure that,

そんな季節も一緒だった = そうどんな季節も一緒だった
Sonna Kisetsu mo issho datta = sou donna kisetsu mo issho datta

And

そんな季節も乗り越えてきた = そうどんな季節も乗り越えてきた
Sonna kisetsu mo norikoetekita = Sou donna kisetsu mo norikoetekita.

You can hear the do sound of donna in the lines.

^ :O you're right!

I had my roommate listen again and he noticed he made a mistake haha

woops~ :)