Mr. Back Now

A rapper who released the song "Yeah (Mr. Back Again)" .

Under his new name, Choi Shin-hyung, he experiences love for the first time with a young part-timer, Eun Ha-soo, and attempts to reconcile with his estranged son. Mr. Back

In the world of Bitcoin, "Mr. Back" refers to , a prominent British cryptographer. A rapper who released the song "Yeah (Mr

He is the creator of Hashcash , a proof-of-work system cited in the original Bitcoin whitepaper by Satoshi Nakamoto. "Mr. Back" refers to

Check out the official trailer for the drama to see the transformation in action: Mr. Back - Trailer DaehanDramaTV YouTube• Sep 21, 2015 2.