A young man that reinforced in another world and he create his own world

The transparent blue window slowly expanded before Saiki, revealing a character customization menu. At first, he hesitated, but curiosity soon took over. He entered his name — Saiki — then began shaping his appearance. He gave himself dark black hair mixed with faint streaks of red and white, sharp eyes, and a toned physique with defined abs. For clothing, he chose a traditional ancient Japanese outfit, dark and elegant, flowing lightly as if untouched by gravity itself. · Once he finished, the screen shifted to the next page. · A glowing title appeared: · Choose Your Primary Magic · Six different elemental attributes floated before him like shining symbols: · Fire · Water · Earth · Darkness · Wind · Light · Saiki could only choose two. After a moment of thought, he selected Fire and Light. The symbols burst into glowing particles before disappearing into his body. · The menu changed once more. · Choose Your Secondary Magic · New elements appeared before him: · Ice · Acid · Crystal · Wood · Plasma · Again, he was limited to only two choices. This time, he chose Ice and Plasma. · As soon as he confirmed his selection, the final page appeared before him. · The title was different from the others. · Build Your World · Saiki’s eyes widened. This page allowed him to create the world he desired. Without hesitation, he began shaping it piece by piece. He created a world with no humans at all — only nature, mystery, and endless landscapes. Massive volcanic regions filled with rivers of lava, frozen kingdoms buried beneath eternal snowstorms, floating islands drifting across the sky, glowing crystal caves deep underground, poisonous swamps, endless forests, and oceans untouched by civilization. · It was a world that felt alive… yet strangely lonely. · But at the very bottom of the page, written in glowing red letters, was a warning: · Warning: · Once you complete the creation process and enter your world, all memories of your previous life will be erased. · You will only retain the skills necessary for survival, communication, and construction. · Even the world you created… will be forgotten. · Saiki stared silently at the warning screen, unable to tell whether this was the beginning of freedom… or the end of himself.