Operation: Heartbeat

"Don't you think we're missing that heart-fluttering feeling?" From elementary school all the way to high school, Nam Do-yeon and Jeong A-rin have gone from childhood friends to lovers. For a couple who strives for a perfectly rational relationship, a plan to reclaim that one missing piece of excitement— Operation: Heartbeat begins! **Original Webtoon:** [Naver Webtoon](https://comic.naver.com/webtoon/list?titleId=845717), [Naver Series](https://series.naver.com/comic/detail.series?productNo=13515100)