Iwao Oguro vs. Kendo Rappa

Iwao Oguro vs. Kendo Rappa is a battle fought between the Pro Hero O’Clock, disguised as the The Ripper, and the underground fighter The Rapper.

Prologue
O'Clock has been investigating the trafficking of uppers and Quirk-boosting drugs for quite some time, and their investigations led them into the world of underground fighting. In order to infiltrate that world and continue with his investigation, he becomes The Ripper, an underground fighter specialized in knife combat and who does not need to use his Quirk to win, achieving five victories and no losses.

His success in fights opened the doors to a masked fighting tournament known as the Underground Masquerade, a safe haven fighting ground for anybody willing to wear a mask. That place is one of the main distribution centers for the Quirk-boosting drugs, since many of the undergrounds fighters dope themselves with the enhancing substance for the fighting. To obtain some evidence, O'Clock decides to participate in the illegal tournament and calls Detective Tanuma and the police to back him up, to assure him of an escape route once he has obtained what he was looking for and then break up the illegal event. With everything ready, O'Clock disguises himself as The Ripper and goes inside.

Once in the underground arena, the ring announcer introduces him to the viewers as The Ripper, then, he introduces who will be his opponent, the unstoppable human being with 20 wins and zero losses, Kendo Rappa, here known as The Rapper. Before the match begins, Kendo complains that both he and his opponent have similar stage names, which makes things a bit confusing. He also complains to The Ripper for using a knife, telling him that if he wants a real fight, he must fight like a real man, without weapons, like him. The Ripper taunts him asking if he's afraid of him and his knife, but he denies it and encourages him to come at him, knife and all, as he sticks with his code.

Battle
As soon as the bell rings, Rappa attacks Iwao with an onslaught of punches thanks to his Strongarm Quirk. Iwao can barely defend himself against the brutal strikes and is thrown violently against the barriers of the fighting cage. This also causes Iwao's Ripper mask to come flying off and lose the knife.

Despite the murderous rush, Iwao stands up, declaring that he had a soft spot for simple guys. The announcer is impressed that The Ripper endured the brutal flurry of blows, but since he isn’t unscratched and he is unarmed, he considers his only option is to admit defeat. To his suprise, The Ripper says he keeps going. Iwao looks at Kendo and smiles, stating that since he's a nice guy, he's going to play by his rules and fight weaponless. Rappa is happy to hear that and praises him, as he pounces on him to continue the fight.