Gemini spectrum of KSP-OT-202104a obtained by combining blue and red spectra shown after 16 Å smoothing. Extinction is not corrected. The locations of H and He lines often observed in WZ Sge-type DNe are marked by vertical lines: solid, dotted, and dashed lines for H I, He I, and He II, respectively. They are Hα (6563 Å), Hβ (4861 Å), Hγ (4340 Å), Hδ (4102 Å), Hϵ (3970 Å), Hζ (3889 Å), He I (red), and He II (black), while wavelengths are shown for helium lines.