Isekai Kazoku Hyouryuuki: Fushigi no Shima no Elsa
異世界家族漂流記 不思議の島のエルザ
A family stranded on a remote island in a different world encounters a wild girl who cannot speak. After failing entrance exams, Shinjou Ren and her family celebrate with a trip that unexpectedly transports them to another realm. There, they meet the girl, whom they name Elsa, and begin their journey together.