The second collaboration "Knock Knock" following "Circle" with macico horita is a track where the synergies of the two backgrounds can dance cheerfully toward the summer, and the image of UEBO with a relatively warm image. The powerful singing voice / melody matching to be updated sounds fresh. As the song progresses from there, the concentration of the arrangement and the passion of the song increase, and the development is outstandingly realistic. We hope you enjoy the layers that go beyond the image you can imagine from the combination of UEBO and horita.