OBA-403 I was alone with my friend's mother until morning... - Natsuko Kayama

Hiroki starts working part-time at a restaurant run by his friend's parents, but as he works alongside his friend's mother, Natsuko, he begins to realize that she is of the opposite sex. - Then one night, after work, he misses the last train and ends up staying at Natsuko's house for the night... - Unlike at work, Hiroki tries his best to hide his excitement as she wears no bra, exposing her voluptuous body. - However, when Natsuko gets drunk and her hidden sexual desire explodes, she can't hold back and leads his hand to her chest...