The study of the phenomenon of transdisciplinarity in scientific discourse indicates the emergence of a new strategy for solving real practical problems. A new image of post-non-classical science is being formed. However, there are difficulties with the introduction of a transdisciplinary approach into the methodology of musical pedagogical research and with the practical implementation of the methods and techniques of transdisciplinarity. In order to solve this problem, the narrative “We grieved with one grief and rejoiced with one happiness”, based on the life and work of Boris Grinchenko, is presented and analyzed. Pedagogical observations prove that the form of narration created an open atmosphere for the transdisciplinary transfer of pedagogical skills, united the intellectual and creative potential of teachers and students, and proved the expediency of reorienting the musical and pedagogical processes in the context of postnonclassics. Due to a wide inter- and transdisciplinary synthesis, it has become possible to synergistically combine different ways of perceiving and comprehending the unstable and complex world of art.