Ayanokoji, Hunter x Hunter, Jujutsu Kaisen, Bungo Stray Dogs, Haikyuu!!, Detective Conan, The King's Avatar, One Piece, and various others. All have good writing. They're generally free.
The heroine regards Killua as his true destiny, which is similar to traveling back in time to a world where the spell returns to war.
Still being serialized.
