1화: 우라시마의 신비로운 섬에서 깨어난 세츠나는 기억을 되찾지 못한다
2018년 7월 1일 방영
When he wakes up, Setsuna has no memories. He is on the island left behind by time, Urashima. Everyone he meets is mysterious and puzzling. At night he is surprised by a girl singing on the beach, and somehow says her name. "Rinne..." (Source: Crunchyroll)