Higher than Heaven

A 15-year-old boy was running for his life.

He found a cave and entered, trying to hide from his pursuer.

However, there was an old man inside it and he was put to sleep by the old man for 1000 years.

Inside his dream, the old man gave him an inheritance.

Inside his dream, he became the supreme being, lived for billions of years and created several powerful techniques that surpass what the old man gave to him. And more importantly, inside his dream, he created his harem!

One day he opened his eyes and woke up from his dream.

PS. Author's real penname is Penless, apparently the user name Penless in this site already exist so I used PenlessRR as username