One day, Lin Tian, an 18-year-old high school student, accidentally binds with a producer system. As long as he binds with a partner and cultivates them into a super “idol,” he can receive rewards. When he meets the equally eccentric and obsessive cellist Gan Yanyu, they hit it off immediately and start creating short videos, striving to achieve the highest honor in music competitions! Thus, In a season of cherry blossoms, just after winning an international competition, Gan Yanyu plays a piece that Lin Tian has never heard before on the stage in front of thousands of spectators. To Lin Tian's astonishment, the young girl puts down her bow and beams a radiant smile. “You’ve written so many pieces for me; this one is my composition for you.” “It’s called—‘Love Letter.’”