Derai says the friend's Instagram account had pictures of "cars, hands holding £50 notes, holidays".
"It was glitz and glamour," he says. "She’d say: 'I made this much money today and you can too'."
Derai responded to a "quick cash" advert on Instagram and was put in touch with someone he now knows was a money mule recruiter.
After exchanging messages Derai shared his bank details and £4,000 ($5,000) was put into his account the same day.
"I wasn’t used to my bank balance being a four-digit number," he says.
Derai says it seemed too good to be true. He would eventually find out that it was.