Our Blooming Youth Season 1 Episode 4 Episode 4 ( Air Date 2023-02-14 ) Genre Drama, Mystery category. Overview "Hwan gives Jae-yi a second test. She must figure out why the messenger he sent to Master Min's house was killed and Jae-yi finds out it has something to do with Hwan. And finally, Hwan gives the last test which is to solve a serial murdercase. Now Jae-yi must face her fiancé.".