FSDSS-318 ``Are you interested in my breasts?'' I got an erection after being teased by my senior's big-breasted girlfriend...

``You're curious about my breasts, aren't you?'' I, a test taker, decide to stay with a senior who works in Tokyo to take a mock exam. - My senior is living with his girlfriend, Yuko... Her big breasts become a concern when living in such a situation... - When Yuko saw me imagining my erection, she said, ``I'll give you a titty fuck...'' - A summer event from which there is no turning back.