Song at sanding machine/shower scene ep 8

I really like the song that begins at 00:24 in episode 8. I've read on wikipedia about a new release, part 5, song title Happy performed by 1415. Perhaps it is this song? If so, does anybody know where I can find, and listen to, this new song? Much obliged :)

Thanks for your research! Now I know this must be Happy. The music begins when Duk Mi starts working with the sanding machine and Eung Gi is taking a shower. 

I think I swapped the digits in the timing, it should have been 00:42 haha. I’ll edit the header of my topic.

Bummer you can’t hear the song, perhaps there’s a difference in regions? 

You’re awesome, thnx!