YOU SAID:

Jewker has to change his union to defeat the enemies

INTO JAPANESE

ジューカーは、敵を倒すために組合を変えなければならない

BACK INTO ENGLISH

The juker must change the union to defeat the enemy

INTO JAPANESE

ジューカーは、敵を倒すために組合を変更しなければなりません

BACK INTO ENGLISH

The juker must change the union to defeat the enemy