Concert

You join the band. They give you an address and ask you to meet them there the next day to practice. 

During practice, you tell them all the truth- that you had never played drums before. They laugh.

"Wait, seriously?"

"I guess you're just a natural, then!"

The next week, your band plays another concert in the same bar. The owner offers you a weekly spot. 

Your band starts to pick up gigs all around the Lower City. You even begin to amass a following. 

Years later, your band is one of the most popular in all of Rodentia. You're playing sold-out shows every night. 

One night, after a massive stadium concert, you and your band come to a decision. It's time to split up. There's no major issues or anything, it's simply time to move on. Might as well end it off on a high note. 

You split from the band and live your own life. The four of you made more than enough money for each of you to live in comfort for the rest of your lives. You're even able to buy a nice apartment on the outskirts of the Upper City. 

You never lose contact with the other members of the band. You occasionally all get together and play, for no audience, just for yourselves.