AnimationA flyer lures Chiikawa and friends to an island where a giant siren has been carrying off the islanders
Chiikawa's first film adapts the Siren arc, a long story Nagano posted on X. It opened in Japan on 24 July and took more than 15.84 billion yen at the box office in 59 days. In Korea it opened on 30 September and passed one million admissions ten days later, on 9 October.