aya hoshino's grandson, whose parents are divorced and mother is often away on business, has been taken care of by his grandmother aya for a long time. as a result, even after becoming an adult, he remained a mama's boy. eventually, his feelings turned into romantic love. one day, he caught aya masturbating, and his desire for his grandmother exploded. seeing his young, hard cock, aya invited him in and gently wrapped her lips around his cock.