Pirate: I, son of Roger, Admiral!

Introduction: Traveling to the world of One Piece for seven years, the mediocre Iggy thought he could live his past life like this.But until three days ago, Ige learned that he was the late One Piece——Roger's twin sons!Ace is his elder brother, and the cheap dad who has been taking care of him is Long, he has to be called Grandpa Garp!Immediately, Yige was in a mess. "Ding, congratulations to the host for obtaining the Myriad Realms check-in system!" "Ding, successful check-in, rewarding LV6 of rustling fruit ability!" "Ding, successful check-in, rewarding LV5 of supreme swordsmanship!" "...As the daily check-in progressed, Yige became the admiral of the navy!