World Trigger Season 1 Episode 20 Duel! Yuma VS Midorikawa ( Air Date 2015-03-08 ) Genre Animation, Action & Adventure, Sci-Fi & Fantasy category. Overview "Yuma and Shun Midorikawa's fight begins. Yuma quietly rages over Shun's humiliating public defeat of Osamu. How will he fight against the A-rank vet? Meanwhile, Commander Kido convenes a meeting to prepare for the forecast massive Neighbor invasion.".