热带岛狂热：我的寄宿家庭太淫乱！4

After holding back for a week, Akari and Tsuzumi reward Kei with a swim at the beach, where they of course have more then just swimming planned. Once they get back from a day full of threesomes and creampies, Kei helps their mother, Tamaki, move some boxes... as well as control her libido. While continuing to have sex with each other behind Akari and Tsuzumi's back, Kei learns more of the past of the family, and what happened to the father. Will Kei be able to hide his secret relationship with their mother from Akari and Tsuzumi