If I'm With You

Since they were kids, Dal had been taking care of Saebyeok who had a weak heart. Dal knew all about Saebyeok's irritability, yet he still kept on taking care of him which resulted in Saebyeok getting obsessed with Dal. But one day, Saebyeok's secret came to light and gave Dal a huge shock... Will these two people be able to protect each other's feelings?