The upcoming Hyper-Kamiokande (HyperK) experiment is expected to detect the Diffuse Supernova Neutrino Background (DSNB). This requires to ponder all possible sources of background. Sub-GeV dark matter (DM) which annihilates into neutrinos is a potential background that has not been considered so far. https://www.roneverhart.com/Vuori-Womens-Shirt-Long-Sleeve-Mudra-Fitted-Tee/