Synopsis
A seemingly ordinary summer takes an extraordinary turn when Michishio Nagasumi finds himself face to face with a mermaid, Seto San, who saves him from a near-drowning incident. However, their encounter sparks a dangerous consequence-San's yakuza mermaid family demands that either Nagasumi or she must pay the ultimate price. To break this curse, Nagasumi bravely proposes marriage, setting off a wild ride where he must keep San's existence hidden from the world while facing unexpected challenges…
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