The Day the Sawada Family's Eldest Son Went Missing

*Modern Shanghai / One Piece / Demon Slayer / Jujutsu Kaisen / Katekyo Hitman Reborn hotpot (complete) Main story complete. Arthur, whose real name is Sawada Ietsuna. One day, he vanished from home and fell into a strange world called the Cavern. The eldest son of the Sawada family began a hellish struggle to survive in a fantastical city. To return to the home he had left behind, he made a contract with a demon and became a sorcerer. As long as he cast a spell and opened that "door," Arthur could reach another world. ...Tsun, your big brother here has turned into Dora**mon... Even if the door's destination and time were completely random, and crossing through it shrank him back into a little tyke every single time as a side effect, he still had to go home! With unwavering determination, Arthur stepped through the door. Then he discovered he had arrived on a remote island that had just been ransacked by pirates. An epidemic was brewing there, the stray dogs ate better than the people, and a mute child was using up their already meager survival supplies. Arthur, who had asked Boss Smoker for nothing but a gold bar as a parting gift, looked up at the sky. ...That was a mistake. He could worry about getting home later. Right now, surviving on this deserted island was what mattered most. * "The Grand Line" - A Marine Admiral on patrol rescues two children. The Marine Admiral, known as Buddha, forcibly straightened out the life that the demon had led Arthur astray in. The coldest cleaner in the family was successfully redeemed and became one of the legendary Marine Vice Admirals under the banner of justice, personally establishing the strongest branch in the New World. "The Taisho Era" - He arrives in an age where demons and curses dance together. In this romantic Taisho-era tale, flowers bloom red with blood, and misfortune and good fortune are forever intertwined. To return home and to destroy demons, the mysterious goldsmith wanders through courtyards flowing with cascades of wisteria. They say the patterns on Nichirin Blades can protect demon slayers and bring them home safely. "Another Yokohama" - A subtle difference leads to enormous changes in a parallel world. After landing there and reliving old dreams, Arthur drifted through life in a daze for years before suddenly coming to his senses. The place names all matched, and the port was still the same port, but what were these supernatural abilities? Why were the literary giants he had learned about in children's books fighting each other? And one very important thing: every generation of the Sawada family had been law-abiding citizens. * Over his journeys through several worlds, Arthur met many people. An accident years ago had torn him away from love, but the people he met along the way gave him even more love, until he no longer feared any parting. "Set sail!" That person said to Arthur. "You already have more than enough courage." * The male lead is a native of the Katekyo Hitman Reborn world, and the biological older brother of the Tenth Generation. * The book will be locked from Chapters 23 to 58. If you've read those chapters, please don't buy them again~ Thank you all for your support. Theme: The love of friends and family is precious.