Jin Soo sat in his classroom, staring at the board. The teacher was talking about math, but Jin Soo didn't care. He wished he was home, playing his favorite video game. In games, he was brave and strong, but in real life, he felt weak and alone.

After school, he decided to wander around the old part of the building. Most kids never went there because it was dusty and dark. But Jin Soo liked the quiet. As he walked, he saw a door that was slightly open. It looked different from the other doors.

Curious, he pushed it open. Inside, he found a small room filled with strange things. Old books, dusty shelves, and in the middle, a glowing blue object. It looked like a small stone, shining softly.

Jin Soo felt drawn to it. "What is this?" he wondered. He stepped closer and reached out to touch the stone. 

The moment his fingers touched it, everything changed. A bright light surrounded him, and he felt dizzy. When the light faded, he was no longer in the small room. 

Jin Soo found himself standing in a huge forest. Giant trees towered over him, and strange creatures moved in the distance. He blinked in disbelief. "Where am I?" he whispered.

Suddenly, he heard a loud roar behind him. A massive creature, much bigger than him, was charging forward. Panic hit him. "What do I do?" he thought.

He remembered his gaming skills. "Stay calm," he told himself. Jin Soo turned and ran, dodging the creature's powerful attack. Adrenaline pumped through him as he tried to think fast. 

He spotted a large tree ahead and quickly climbed it. The beast could not reach him there. From above, he watched as it stomped around, confused. 

After a moment, the creature finally left. Jin Soo climbed down, trembling but alive. "I made it!" he said, still trying to understand what had just happened.

As he caught his breath, he looked at the glowing stone still in his hand. "This must be how I got here," he thought. 

If he could switch worlds, what else could he do? A mix of fear and excitement filled him. He had a feeling this was just the beginning of something big. With a determination he didn't know he had, he whispered to himself, "I need to learn how to use this power."