Oh Hye Won

A sexual scandal between a math teacher and a student in a prestigious high school ends in tragedy. Four years later, they meet again, now both adults, to reveal the corruption in school and to regain one's reputation as a teacher. Ji Yoon Soo is a high school math teacher with a bright smile and a positive impression of others. She is a hard-nosed and stubborn person who has to push ahead with the decisions she has made. She is a math geek who loves solving difficult problems and teaches students to purely love math. Baek Seung Yoo is emotionless and has no light in his eyes. He used to be a math genius who appeared on a quiz program at the age of five and surprised the world by solving college-level math problems. He was admitted to MIT at the age of 10 but dropped out at the age of 12, and suddenly disappeared. (Source: CJ ENM)

The series follows the story of a group of strangers who are all having a hard time processing a horrible experience from their past. Each of them is going about their normal lives when they are all strangely pulled to a light shop located at the end of a dubious alleyway. A cautious shopkeeper guards the light shop, which may contain the key to the strangers' pasts, present, and futures. (Source: Wikipedia) ~~ Adapted from the webtoon "Shop of the Lamp" (조명가게) by Kang Full (강풀).