YOU SAID:

Me doing & Kunckles for the 100th time while my cousin does Gotta go Fast for the 1st time:

INTO JAPANESE

私のいとこが初めて速く行かなければならない間、私は100回目のKuncklesをやっています：

BACK INTO ENGLISH

I'm doing the 100th Kunckles while my cousin has to go fast for the first time:

INTO JAPANESE

私のいとこが初めて速く行かなければならない間、私は100番目のKuncklesをやっています：

BACK INTO ENGLISH

I'm doing the 100th Kunckles while my cousin has to go fast for the first time: