“You kicked out my partner, are you going to replace him?” The long-standing unwritten rule of the Korean university <B-b#> band club is not accepting Alpha or Omega members. However, the band leader, Ji-hyuk, falls in love at first sight with the vocalist, Myo-jin, and scouts him despite the fact that he is an Alpha. Myo-jin brings his Omega partner into the band and acts arrogantly, but Ji-hyuk kicks out his Omega and says that he will become the rut partner instead…