Diamond is Unbreakable - Chapter 18 
The Nijimura Brothers, Part 10 (虹村兄弟 その⑩ Nijimura Kyōdai Sono 10), originally Electric Nightmare (エレクトリック・ナイトメア Erekutorikku Naitomea) in the WSJ release, is the eighteenth chapter of Diamond is Unbreakable and the two hundred eighty-third chapter of the JoJo's Bizarre Adventure manga.
Josuke tells Keicho to give him the Bow and Arrow and he will destroy it. Okuyasu enters the room and tries to persuade Keicho to give him the Arrow. Keicho tells Okuyasu that he is not his brother anymore - he will have to kill him as well. A mysterious person is seen looking into the room from the window and a Stand comes out of the electrical outlet. Okuyasu is standing in its way and Keicho knocks him away.
The Stand grabs him and the Bow and Arrow and tells Keicho that he shot him with the Arrow but since then his Stand, Red Hot Chili Pepper, has improved. He electrocutes Keicho and sucks him into the outlet. Josuke and Okuyasu climb to the roof and see Keicho dead on the electric cables. Okuyasu says that even though he was a nasty person, in the end Keicho sacrificed himself for him.