Someone's Girlfriend Vol. 1

This sexy romance manga follows one young man's forbidden entanglement with his best friend's girlfriend! Riku can't get Shizuku out of his head to the point where she's invaded his dreams. Then one day she stops by his house and comes on to him hard: "Do whatever you want to me." The catch? She's his best friend's girlfriend. In their last year of high school, a dangerous romance brews!