I Traveled to Another World and Saved the Princess

[Travel time + different world + adventure + no love + secondary 2 + imagination + no brain + light novel style] Him! He is a modern sunny and cheerful boy! Swallowed by a strange black hole, there is actually a different world on the other side of the black hole! The inexplicable free fall actually ended up in a palace in another world! Is this the beginning of a summoning from another world? He kidnapped the princess at the beginning and started a difficult dungeon again! Is this how the protagonist is treated? Super invincible and good protagonist treatment, his adventure in another world begins! ! ! Uh... (~_~;) Don't worry about logic in the plot. It has no logic. It's just a story about a sunny guy surviving in a different world.