Summary
"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!
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Alternative Titles: The Heart-Pounding Operation, 두근두근 대작전, Operation: Heart-Beat, Chiến Dịch Rung Động Trái Tim
