KD REVIEWS: IT’S OKAY NOT TO BE OKAY. MAIN ACTORS Kim Soo Hyun and Seo Ye Ji KIM SOO HYUN SEO YE JI PLAYING Moon Gang Tae and Ko Mun Young. KIM SOO HYUN AND SEO YE JI. Funny fact Sang Tae was actually played by Kim Soo Hyun’s real brother, funny considering his role in the drama. KIM SOO HYUN AND HIS BROTHER [Oh Jung Se]. ENJOY THIS ARTICLE This Netflix Series shows the romantic love story between a fairytale writer with a social disorder, Ko Mun Young , and a worker at a psychology hospital, Moon Gang Tae . Moon Gang Tae has a senior brother , Moon Sang Tae , who was born with autism. As Gang Tae struggles to help his brother, he also has to move every year because of his brothers fears of butterflies. Sang Tae fears butterflies because their mom was killed by a woman, and Sang tae was only able to get a glimp...