Stepfather seduced his two daughters into having sex while his wife was away

Miru Sakamichi and Shion Yumi are two sisters living in a family where their father passed away early, so their mother got married to a new husband. He was a stepfather who looked kind and decent, so the two girls loved him very much. After some time living together, his stepfather's bad habits were revealed. Unsatisfied with his wife, he wanted to have sex with his two daughters as they were always in a state of cloudiness, making his saliva drool.