The novel in the YA genre by famous Korean female writer Sohn Won-pyung was awarded the prestigious Changbi Publishers Prize in 2016.

It is a candid coming-of-age story of two extraordinary young men, each of whom has faced severe trials and bitter loss. Yunjae, who is unable to feel emotions due to a brain development disorder, meets impulsive and rebellious Gon — his complete opposite. What will their interaction bring, what will it reveal about themselves, and how will it change their lives?

This novel garnered significant attention immediately after its publication, and soon, thanks to a recommendation from the popular band BTS, it became a super-bestseller. In Korea, sales have long surpassed one million copies. The book has been translated into twenty languages worldwide.