Hey! Say! JUMP's new song "Last Mermaid..." will be used as the theme song for TV drama 'Kaseifu no Mitazono' season 4. 

At the end of each episode, the drama's cast, including Matsuoka Masahiro (TOKIO) and Inoo Kei (Hey! Say! JUMP), will do a dance to "Last Mermaid..."

Source: natalie