I am in love with the school's number one beauty, Nishijou Kanna. I gave up on her since there's no way she would associate herself with a boring person like me, but I never expected that Nishijou-senpai herself would confess to me. And so we became lovers and went on many dates. Soon after, we kissed and when our tongues entwined... "......?" Feeling something strange, I separated my lips from hers and saw that she's got tongue piercings. Not only that, when she bared her breasts, her nipples also have piercings. Moreover, an ominous tattoo is etched around her abdomen. I didn't knew that way before we started dating, senpai was actually...