He is Psychometric (That Psychometric Guy / Saikometeuri Geunyeoseok / 사이코메트리 그녀석)

[VIU Ver.] Episode 7-8 | Fixed common errors. | You can find the complete OST with English subtitles: https://www.youtube.com/playlist?list=PLIDckZuI0IdVqLYUh-ukfAvXnJepWGG-N