Oh wow, you replied when I got on xD. Their iyagi stories are on Youtube. Also I recommend this book https://www.amazon.com/Korean-Stories-Language-Learners-Downloadable-ebook/dp/B0796WLNBP/ref=zg_bs_158212011_15?_encoding=UTF8&psc=1&refRID=MNR1PPM70B9NP4MBRXPA

I know it's a fairy tale, but it's actually good for understanding Korean structures (Low intermediate probably). The fairy tales start easy at the beginning, but the stories gradually get longer and complex (not as complex tho). It also includes audio, so you can just put that on repeat if you wish.