Jeez Ryuuchi..that is pathetic..
One of my first jobs at 18, involved me working at a nursing home. It involved me literally working non-stop 9am-2pm with no lunch break. I had to feed old people, clean them, dress them, wipe up after them when they went to the toilet, virtually do everything for them. As soon as I got home everyday, I would dread going back the next day. But I did. I managed to stay there for a month before I had to stop because of uni. What I'm trying to say is that at the end of the day, you can't always expect to like a job and earn a wage. I think it's very irresponsible and selfish of you to give up on the job after a few days. Your friend went out of his way to get you that job after all. And you're there on his recommendation are you not? How do you think that makes him look like to the manager?

It's all well and good that you're looking for a different job, but what about now? What the heck is your back up income when you've given up on your current job?

I'm afraid you've taken a step backwards Ryuuchi.