Simultaneous fit of the invariant-mass distribution (top panel) and the elliptic-flow coefficient, $V_{2\Delta}^{\phi\text{-}h}$ (bottom panel), as a function of the invariant mass of oppositely-charged kaon pairs in the transverse-momentum interval 1.6 < $p_{\rm T}$ < 2 GeV/$c$ in OO collisions at $\sqrt{s_{\rm NN}}$ = 5.36 TeV for the 10$-$40% $N_{\rm trk}$ class. The total fit function is shown as a solid blue line, while the combinatorial background contribution to the invariant-mass distribution is indicated by the red dashed line.