I've Been Killing Slimes for 300 Years and Maxed Out My Level, Vol. 8 (light novel)

I never set out to be stronger than a goddess, but the power does come inhandy when you have to stop a fight between deities. Meanwhile, Sandra hit agrowth spurt, (a big one!), we took a trip to a deserted island, and someone I''mpretty sure I''ve never seen before came to repay a debt?!