The axes and symbols are plotted as in figure 3. (a) Hα light curve of YZ CMi on January 17. (b) TESS light-curve of YZ CMi during the OISTER observations on January 17. (c) Hα, Hβ light curve of flare B. (d) Same as panel (c) but for the flare component’s continuum luminosity in the TESS band. (Color online)