The author graduated from Sungkyunkwan University with a degree in psychology and is working as a copywriter at an advertising company. Somehow, it has become a hobby and a job to think about an unanswered question. It gained sympathy from many viewers by publishing a series of magazines with its own simple yet sharp eyes at Kakao Brunch. The magazine's writings were woven into books to stimulate the sensibility of a wider range of readers.