Unsatisfied, I Was Reborn in a Parallel World

The voices of a man and a woman came from the bathroom! "Ahhhh..." "Hurry... Hurry up." A woman's urging voice sounded. "Don't rush me!" "There's no rush." "Too... Too big!" "Why is it so big?" There was a slight tremor in the female voice. "Maybe something happened?" There was also a hint of curiosity in the man's words. "Stop playing." "I'm so scared!" There was a tremor in the woman's voice. "Don't be afraid." "I just stick it in and it'll be fine." The man began to comfort him. "Can it really be stuffed in?" The female voice was very surprised. The man's name is Gu Cheng, and he was originally a social animal who was exploited by his boss all year round. After being picked on for no reason, Gu Cheng went to a bar to get drunk in a depressed mood. On the way back, he didn't notice that a manhole cover was opened, and he was reborn back to his high school days! As soon as I woke up, I was dragged to do that by the gentle and kind-hearted young lady next door...