Yuusha ni Narenakatta Ore wa Shibushibu Shuushoku wo Ketsui Shimashita. EP1 - I Couldn't Be a Hero, so I'm Working the Register

Raul Chaser, the main character, is shown training to be a hero alongside Airi "All A", among others. At the end of the session they find out that another hero has defeated the Demon Lord and there is no longer any need for them to train.