A Siren in Midsummer

Whilst out at a campsite, high school students Yuya, Harumi, Ryo and Takafumi were there when Yuya suddenly announced, ‘I’m going to secretly confess my feelings to someone here.’ However, shortly afterwards, he fell from a suspension bridge and died. Ten years later, the three of them meet at a school reunion and begin to suspect one another, wondering whether it was not an accident after all, but a murder committed by one of them. As they reminisce about their high school days, the true nature of their relationships with Yūya is gradually revealed—