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Operation: Heart-Beat
También conocida como: The Heart-Pounding Operation · 두근두근 대작전 · Chiến Dịch Rung Động Trái Tim · Operação: Coração Acelerado · Operation Heart-Pounding · Chiến Dịch "Rung Rinh" · Operation Pit-a-Pat · Operation: Heartbeat · The Heart-Pounding Grand Plan · Операция «Трепет» · ภารกิจรีสตาร์ตหัวใจ · 僕らの恋は、計算通りにいかない · 心动大作战 · Dugeundugeun Daejakjeon
"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!