Don't Add Random BGM to a Passerby!

Song Tianshi was surrounded by big guys. My classmate is a reasoning genius, my childhood friend is a good athlete, and even my next door neighbor is a trainee of a teenage idol. In comparison, Song Tianshi was just an ordinary passerby. Until one day, Song Tianshi accidentally opened a new show and discovered that he was actually a very popular character in the multiverse of the show, and he was also a mysterious hidden boss that fans said was both good and evil, and walked in both black and white. Song Tianshi: Boss? Me? (Referring to oneself) He opened the new episode and watched it carefully, and discovered the reason—— Whenever he appears, the director will give him strange BGM. A case occurred, and the reasoning genius was stuck in the bottleneck of solving the case. Song Tianshi passed by and encouraged with a smile. (A suspenseful and thrilling BGM sounded) Barrage: A casual word solved my doubts! He has already seen through the truth! In the sports field, the athletes were frustrated when they lost to their opponents. Song Tianshi cheered from the sidelines. (A burst of passionate BGM sounds) Barrage: Why is the BGM of the cheerleaders so hot? Wait, he is reminding the protagonist what tactics to use! Could he be the legendary retired talented athlete? On the street, Song Tianshi walked down the stairs normally. (A blast of rock BGM sounded) Barrage: The clown's ditty! Is he the dark hero of this crime city? ! At the door of the house, Song Tianshi greeted the idol girl with twin ponytails. (The relaxing and cheerful BGM stopped abruptly) Barrage: Help, don't scare me! There is something wrong with this Song Tianshi, magic girl, run away! Song Tianshi frowned. What is this all about? The audience will be confused. (A majestic and epic BGM sounded, the kind with a chorus of vocals) Barrage: If the boss frowns, there must be something wrong! He must be planning to conquer the world! Song Tianshi:? Intention: Evil cannot defeat good