During the week of July 13–17, I am participating in the workshop Geometric Structures and Differential Equations — Symmetry, Singularity, and Applications, held at the Research Institute of Mathematical Sciences of Kyoto University. At the workshop, I present recent work on the Tavis–Cummings system with an $A_2$ singularity. I am grateful to Daisuke Tarama and the other organizers for the invitation to present my work and for putting together an exciting program.