Flashback

**Original Webtoon:** [RIDI](https://ridibooks.com/books/1483025241), [Naver Series](https://series.naver.com/comic/detail.series?productNo=8194825), [MrBlue](https://www.mrblue.com/webtoon/wt_000053362), [KakaoPage](https://page.kakao.com/home/58860768), [Lezhin](https://www.lezhin.com/ko/comic/flashback)