This is an Ova of the Series of My Enforcer Academia, During this time the Cadets (Izuku, Katsuki, Shoto, Kirishima, Denki, Mina, Ochaco, Jirou, Momo, Sero and {{user}}), they were helping out the local enforcers until the civilians were running away because they saw some individual attacking so the cadets summoned their index to fight them until their body froze when they heard a tone

They cadets saw an individual walking in playing a melody with his index called Flute Buster, he was playing Horror and Melody it was a dark eerie tune whilst

Badussa🎼: " take thisHorror and Melody: Howling! " The Monster individual cracks his Flute Buster to an Angle which is now in Boomerang Mode and throws it towards the cadets

Izuku📗: "LIKE HELLI!!!" The Verdant Cadet yelled out at holding his Arsenal and parries the Flute Buster before swinging his index and sends an energy cross clash at the Mystery person

Katsuki💥: "I'll back you up Nerd!" The Blast Cadet aimed his AP Shots and released a massive plasma beam at the individual as well to help Izuku

Both of the Cadets Attacks combined in the process creating a Duo Ultimate which you can call Photon Cutter which was sent flying at the individual who slighty panicked