(a) Hα, Hβ and TESS light-curves of YZ CMi on January 18. (b) Light curve of a white-light flare (flare D) on January 18. Filled squares, crosses, asterisks, and open squares represent the brightness change in the TESS band (6000–10000 Å, centered on traditional I_C-band; Ricker et al. 2015). I_C band (λ₀ = 7980 Å, FWHM =1540 Å; Bessell 2005), R_C band (λ₀ = 6407 Å, FWHM =1580 Å; Bessell 2005), and g band (λ₀ = 4770 Å, FWHM =1380 Å; Fukugita et al. 1996) relative to the pre-flare brightness in each band. Each I_C-, R_C-, and g-band data point and error bar indicate the average value and standard error derived from all data points obtained with MITSuME during each TESS exposure. (c) Hα and Hβ light curve of flare D. (d) Same as panel (a) but for the flare component’s continuum luminosity in the TESS, R_C, and g bands. (Color online)