Going Back and Forth Between Earth and The Other World with Space Time Magic

Though he received the skills necessary to teleport across worlds, the king who performed the summoning ritual attempted to trick him into wearing a s*avery collar, this annoyed him so he kidnapped the princess and returned to Earth. While traveling between worlds with the skills he received, together with the kidnapped Princess and his little sister, they lived happily ever after? — Description from novelcodex.org