[Crossover] A Max-Level Mage Comes to Yokohama

A graduate of the Shibaili royal academy, Harwell is an advanced magic user. After finally graduating from the royal academy, before he even had time to celebrate, he accidentally broke his father's magic pendant. Now he has to search across different space-times for the scattered magic fragments, or the world will collapse. He watched as his father, leaving no room for refusal, tossed him out of the moving castle. Harwell (reaching out desperately): Wait, let me grab a few bottles of hair dye first!!! -- The road home is long, and the way forward uncertain. Luckily, he received support from an honest man in Yokohama and managed to settle down. It's just that the honest man's friend, the bandage-wearing weirdo, is a bit of a handful. "Ah, Will, are you a magician? Hmm, then could you make me a potion that lets me die painlessly?" After being asked again and again, Harwell watched him sneakily drink the potion he was so proud of, yet show no signs of dying. Through gritted teeth, he snapped, "Get lost!!!" -- "Huh? What's that behind you... a will-o'-the-wisp?" "What kind of breathing technique do you use for training?" "How could magic possibly kill a demon?" Faced with everyone's doubts, Harwell pulled out his trump card, the one he'd been saving for a rainy day: "Light." "I don't know if magic will work, but surely they can't stand sunlight, right?" The Pillars: "..." The demons: "..." What the hell... Why are all your skills maxed out?! 1. The male lead is a bit narcissistic and cares a lot about his looks (maybe he inherited it from Howl). If that's not your thing, don't read. 2. No chapters banked, so I'm having a great time =ω= 3. Pairing undecided. Written in third person throughout, and there may be no pairing. Theme: World peace.