You defeated Tutorial Muru, but it hasn't jogged any memories. You have a feeling that your skills and abilities were lost, just like your memories. What kind of a hero are you if you have no abilities?
Purun says that it makes perfect sense that you don't know how to hold a weapon, since you've lost your memory. He then tells you that maybe battling a monster would jog your memory and asks you to defeat Tutorial Muru. You wonder if you can do it.