GVH-611 Big-breasted honor student Suzu Aiho learned so many naughty things during summer vacation that she became so lewd that she ended up live streaming sex.

``Suzu'' is a normal, serious-looking girl who can be found anywhere. Suzu's parents are going on a trip for about a month. At the same time, her cousin Jun, who lives in a rural area, decides to take advantage of his summer vacation to take a summer course for his university entrance exam, and he ends up lodging in an empty room at Zuzu's house. In this way, a strange semi-cohabitation life begins for a month during summer vacation, but after one summer...