Yura graduated from university and got a job at a company. After going to a drinking party, she had fun and missed the last train. She happened to remember that her sister's house was nearby, so she called and asked to stay there. However... her sister and brother-in-law are both working and seem to be busy recently, leading to a sexless relationship. The brother-in-law is in a state of sexual frustration... and is aroused by Yura's defenseless appearance. Without any discussion, he attacks her to avoid his wife finding out...
