Adult PC Game: Tsubasa fell during summer vacation Ver.1.04 Final by nekonohoshi Archive

Overview:
Sota is in love with Tsubasa, who is his ch*ldhood friend and is like an older sister.
One day, Tsubasa plays a naughty prank on Souta, and
as an apology, she ends up helping Souta with his free research during his summer vacation.
While traveling around the island for her independent research, Tsubasa is approached by men, and her mind and body gradually fall...​

Tsubasa fell during summer vacation Ver.1.04 Final by nekonohoshi Gameplay Preview