One Piece: I Became Kizaru… But With Rinnegan?!

Roy transmigrated into the world of One Piece and through twenty years of careful, quiet survival, finally clawed his way to the top. Marine Admiral. Glint-Glint Fruit. One of the most feared men on the seas. His only goal? Clock in. Drink tea. Slack off as much as humanly possible. It was going perfectly. Then, just as he settled in to enjoy the fruits of a lifetime of effort, a notification chimed in his mind. [Multiverse Chat Group activated.] Sasuke Uchiha has joined the group. Ai Haibara has joined the group. Tony Stark has joined the group. ... Roy stared at the flood of messages for a long time. "I finally make Admiral… and the cheat code shows up NOW?" — Description from novelcodex.org