JUR-840 "Your stepmother will teach you how to kiss like an adult..." Marina Shiraishi: A voluptuous stepmother who takes the virginity and lips of her innocent stepson.

Marina married a man with a child and began a new life as a family of three. Her husband’s son, Satoru—who had never known his biological mother’s love—initially kept his guard up, but he gradually opened his heart after experiencing Marina’s maternal warmth. However, one day, Satoru—unaware of the proper boundaries between parent and child—demanded a kiss from Marina. As he clumsily yet forcefully devoured her lips, Marina found her maternal instincts stirred to a fever pitch. Gently guiding Satoru as he desperately sought a passionate kiss, she told him, "I'll teach you what an adult kiss is like..."