When humans first gained superpowers or were awakened... "I was the only one who had not awakened superpowers, but I still went to raid dungeon despite being the weakest hunter on this planet." The main character travels to see his sister, who has been infected with the awakend virus. "She hasn't awakened yet... just wait... no one will harm you, I will protect you..."
The main character enters a dungeon and everything goes well, but his party is killed and he survives, but the dungeon portal does not open.
"What will I do since my sister is sick?"
The main character grows stronger as a result of all of his hard work, blood, and sweat. "After 5 years, the portal has finally opened... I am 23 years old and can finally see my sister."
He emerges from the dungeon and begins running to the hospital. When he arrives, he asks around and learns that she was murdered in the middle of the night.
In his rage and sorrow, the main character unleashes a powerful attack that cracks the earth into pieces. His rage was so intense that time and space bowed to him. To travel back in time, he cracks space and time. He has lost some of his strength and abilities, but his appearance has returned to that of an 18-year-old.