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Low-mass (under 1 comma 000 comma 000 MSun) supermassive black holes (light-weight SMBHs) are critical to solve one of the long-standing problems in modern astrophysics comma the origin of SMBHs. Their host galaxies hold important clues to our understanding of galaxy formation and evolution processesdoublePoint they might have evolved from ancient times in the early Universe without major merger events or intense gas accretion on-to their nuclei and comma therefore comma represent the relics of primordial galaxy formation. Using optical selection of AGN features and data from X-ray archives comma we confirmed 124 light-weight active SMBHs comma only 8 of which have available HST images. Here we propose to carry out near-UV-optical imaging of the 116 remaining light-weight SMBH host galaxies using HST WFC3 in the form of a SNAP program comma boosting HST-observed light-weight SMBHs by larger factors. This project will yield sizes comma luminosities comma and stellar populations of a statistically significant sample of hosts comma and probe whether the MBH-Mbulge scaling relation holds in the low-mass regime and central low-mass black holes do indeed co-evolve with host galaxy spheroids.