Tank Chair 9

Waniguchi and the rest of Class A have tried everything they can think of to bring back the sensei they knew and (cautiously) loved, and all it's gotten them is a violent brush with psychic death. They have no choice left but to abduct Nagi, whip him into a frenzy the only way they know how,and attempt to extract information that-unbeknownst to them-he cannot share. Back on a fierce and nostalgic battlefield, Nagi will summon a new power with the help of Naozumi-the Tank Chair Mark 9 Octo-Power Assist!