Ran is my wife's stepdaughter. I've raised her like my own child, but today she finally brought her boyfriend home. I guess she's grown up so much. It's a little sad, but if Ran is happy, I'm fine with it. As a father, I wouldn't do anything to interfere with their budding romance... At least, that's what I thought. But when I handed her a towel in the bathroom, a dark feeling suddenly welled up inside me. Before her virginity is taken by some random guy, I have to protect Ran!