Wen Pu, who has just turned 18, has recently smelled something unusual about his brother Wen Xiu. With strong curiosity, he wants to find out his brother's secret...
"Brother, you can do it! You actually dare to talk about an underground relationship without telling your relatives. It really disappoints me. Working? I'm afraid you are inseparable from your girlfriend."
"Okay, don't tell me. Anyway, I have a lot of free time now, so just wait until I find out all your secrets. When the time comes, let's see how you explain to your parents. If the tiger doesn't show off its power, you really treat me like a sick cat!"
So Wen Pu launched what he called an "investigation", got to know a series of strange guys around his brother, and even discovered a "secret" that he couldn't accept. However, a man named "Gao Xun" gradually occupied the space in his heart......