I Got a CHEAT SKILL in ANOTHER WORLD and Became UNRIVALED in the REAL WORLD, Too

Yūya Tenjō, a young man has endured brutal treatment since he was young. The "portal to another realm" unlocked for him when he fought for his life! The [Big Demon Realm] is on the opposite side of the gate, and there are many ferocious monsters there. Yūya, who had just made his maiden foray into a new planet, developed the capacity to be so powerful as to be vile. He persisted in fighting monsters, and his level continually increased. He was finally reincarnated as the strongest and most resilient youngster! He saved the princess from the monster on a distant planet, where he was the subject of a contentious debate throughout the nation...? In the actual world, many girls started to eagerly pursue him...? The youngster whose level has been elevated is lying in both the actual world and the other reality. This is where the fantastical tale of life-reversing action begins!