C48 Sentence in Prison 2

In the silence of the prison, not a single sound could be heard. At first, he thought that this was pretty good. At least, no one disturbed him when he was cultivating the Nine Transformations of the Black Tortoise. However, as time passed day by day, loneliness began to torture one's heart and lungs. As time passed day by day, one would also feel bored. Slowly, he started to get irritated