Maguro Bussan directed jav starring Mitoma Umi.
All scenes take places in hot spring hotel (onsen), where she and her husband are staying. She then meets random guy (attendant?) with whom she sneaks around having sex. There's bathroom scene, two outdoor scenes and scene in their room.
At the beginning you see her pushing stroller to the hotel, where she meets the guy. They first fool around a little, she goes to blow her husband but wants more. So she sneaks to bathroom with the guy and blows him. They then sneak outside and have sex, where guy licks her and fucks her from behind while standing. After they go have sex in the hot springs, where guy fucks her from behind while other clients watch them. Video ends when they meet in one of the rooms and fuck seriously, from behind, reverse and regular cowgirl and prone bone. Guy ends up cumming inside her.