After graduating from high school, Aya decided to go to Tokyo to find a job. Since she didn't have a room yet, she temporarily stayed in her brother's room. But instead of finding a room and a job, Aya threw herself into playing games! She also dressed quite loosely, so her big breasts were always visible to her brother. Annoyed by Aya's laziness, her brother decided to squeeze these big breasts, making Aya angry and leaving. But unexpectedly, Aya agreed to let her brother squeeze her breasts as much as he wanted. From then on, her brother freely squeezed her breasts, but things gradually went beyond the limit...