The sweltering heat is pushing the SKIP member to their limits! But at that moment, a monster appears and begins to absorb the gas. There is nothing they can do about the monster, which also absorbs the energy of the Arc. What's more, there is a possibility that the monster will explode, putting Hoshimoto City in danger of disappearing! With the mysterious girl's words in mind, Yuma tries to face the situation... But why did the monster appear?