Thinking she's all by herself on the last train home, Nayeon feels the urge to enjoy herself by fantasizing about her desires. However, a reflection from the train windows show that a mystery man is on the same train. He comes up to her and offers his business card. At the thought of seeing this handsome stranger once more, she takes his offer and arrives at a place called Peach Puff. What is this place? What are these people doing? (Source: Lezhin Comics)

An Innocent Sin is originally a webtoon series which has been officially published in book format by Lezhin Entertainment (레진엔터테인먼트) since November 2019. The series was published digitally in English by Lezhin Comics from November 30, 2016 to October 15, 2021.