After her Mother remarried, Sari Kosaka has to live along her new stepfather. The Father quickly discovers Sari is a young lady of extraordinary beauty but very shy. He initially had no bad intentions, but everything happened organically.
First, he discovers Sari-chan has such a huge pair of tits and he began raiding her underwear drawer. Second, he bumps by mistake in the bathroom with her while she was taking a bath, watching her naked a first and second time. In the end, he cannot resist anymore and begins banging her while the Mom is still around in the house.
And well, the plot is not that rare in JAV actually, but what truly makes this video special is Sari Kosaka variety of outraged facial expressions. From disgust to hate to fear, she delivers such awesome acting and I totally loved her reactions.