I’m the Calamity in the Beasts Pirates, I Used and Dumped Momousagi, Then Yamato

After transmigrating into One Piece, Tian Zhi Changli starts out as the boy Kaido of the Beasts picked up to be Yamato's future husband. He thinks he can become a behind-the-scenes strategist and live off his wife, but just after liberating Wano and receiving a Favorability System, the Marines mistake him for a civilian and rescue him. By a twist of fate, he becomes childhood friends with the admiral candidate Momousagi, also known as Gion!

Momousagi's favorability +99! Reward: Great Swordsman level!

After ten years of wandering, he finally returns to the Beasts Pirates and becomes their fourth All-Star: the Wind Calamity!

Kaido's favorability +99! Reward: Mythical Zoan, the Candle Dragon Fruit!

Yamato's favorability +99! Reward: Affinity!

He then conceals his identity behind a mask, brutally kills Momonosuke, deliberately sparks a war with the Whitebeard Pirates, joins forces with the Big Mom Pirates to crush Shanks, takes Whitebeard's place, and launches the Summit War against the Marines!

When Akainu smashes his mask, the entire sea trembles. All those whose favorability he maxed out appear at once.

Momousagi: “I never thought he'd pursue his justice this way. No, I can't let this stand. I have to bring him back, even if I have to drag him home in chains!”

Hancock: “Is this the great hero who killed a Celestial Dragon for me? Wait for me, I'm coming right away!”

Yamato: “Hahaha, you're too late! I already took his first time!”

Hiyori: “My father is nothing compared to Changli!”

Dragon: “Comrade, I knew you wouldn't give up on the revolution!”

System: “One hundred characters have reached one hundred percent favorability. Reward: the ultimate gift pack!”