The Seemingly Peaceful Life at My Retirement Citadel

[Pre-publication: When Natsume Becomes a Boy Band Manager] [When Tsuna Becomes a Boy Band Manager] [Tsuna Says Nothing, Just Keeps Spoiling the Kids] After Yuxi died, he somehow ended up in a game's Honmaru. He thought his life from then on would be peaceful and carefree, but a group of dangerous characters showed up at the Honmaru. Still reeling from the shock, Yuxi received two more pieces of bad news. The sword spirits from his Honmaru had been transported to the Mafia world, and the Mafia world's tutors had been transported to the Hunter world. All three worlds were in chaos. To ensure his own peaceful future, Yuxi traveled back and forth between several worlds, hoping to restore order as soon as possible. But things took an unexpected turn... The old-fashioned sword spirits had their whole outlook changed by modern technology. Mutsunokami Yoshiyuki: "Master, now is the perfect time to take over the world!" The tutors, newly arrived in a strange land, had developed unusual ambitions too. Reborn: "Good-for-nothing Tsuna, your goal now is to become the First Boss here!" Sawada Tsunayoshi: "Resurrection!!!" The quiet, harmonious Honmaru became fraught with tension after the dangerous newcomers arrived. Exhausted in body and spirit, Yuxi said with tears in his eyes, "Just don't tear down the house!" Warnings: 1. OOC alert!!! 2. These three series are all close to the author's heart, and I'm writing them according to my own preferences. If you can't accept that, please stop reading in time! Pre-publication next door When Natsume Becomes a Boy Band Manager System: "Want to become a 'Supernova Top-Tier Star Manager'? Complete the following tasks to qualify for the final contest!" [Task 1: Gather talented yokai and form boy bands with a variety of distinctive concepts] [Task 2: Perform at three beginner-level competitions and earn excellent ratings] [Task 3: Reach over ten million livestream views] Natsume was shocked. "Master, I think a yokai has possessed me?!" "What did you say?! Natsume, don't move. Let me knock it out of you!" Nyanko-sensei charged headfirst into Natsume's forehead, making him wince in pain, and then he had to endure the System's mockery too. "Heh heh, getting rid of me won't be so easy. Unless you take first place and earn the title of 'Supernova Top-Tier Star Manager'!" "I refuse." "Your refusal is invalid. I'll haunt you forever~" "..." Theme: Love life and stay positive