Reborn in the City as a Brother, I, the Immortal Emperor, Don't Pretend Anymore

No female protagonist/family-oriented/with two male CPs Gu Changyuan, the last immortal emperor in the Jiuxiao Immortal Domain who has transcended the tribulation period. On the day of overcoming the tribulation, the heavenly tribulation was split. He was sucked in by a space crack of unknown origin. When he woke up again, he was eighteen years old. Wearing school uniform. The spiritual power in his body... Is about equal to that of an earthworm in the fairy world. Good news: There are spirits, supernatural beings, and monsters in this world—he's not too out of place. Bad news: the original owner of this body had a younger brother who had been stolen for twelve years. Younger brother's perspective: Something's wrong with my brother! The evidence is as follows: Scene 1: Unlock the phone. He entered the wrong password five times, locked himself out, and said to the screen: "This ban will counterattack." (I helped him untie it in three seconds. He commented: "This method is wonderful.") Scene 2: Eating spicy strips. He took a sip, the corners of his eyes turned red, and he said without changing his face: "It is suspected to be a mortal poison." Then he tore another one: "Try one more, know yourself and know your enemy." (Brother, you are almost in tears.) Scenario 3: Playing mobile games. Five kills in three minutes. The system determines that you are cheating and your account will be permanently banned. My account that I recharged with ten yuan! ! ! Scene 4: Taking a theoretical class. The teacher gave a lesson. He closed his eyes and said he was counting mosquitoes. "Two in the north corner, three on the light tube, and one in your hair." My deskmate grabbed it—there really was one. Everyone: Where does this person come from? But this antique that couldn't even put a Band-Aid on it—when someone bullied me, he only looked at it. At that glance, the other person vomited blood. "You can't detect supernatural powers because your instruments are too low-end." Suddenly I felt that being found... Wasn't that bad after all.