Wolf Girl / Lamb Boy

The "wolf" comes to me on nights when there's a full moon out, hollering, "Let me do you!" The one who jumps me hungrily is Cheena Sakamaki, a female! And I'm the guy getting attacked... She isn't my girl or anything, we're just friends who go to the same vocational school. So why is this happening? Because she gets super horny on full moon nights, and I'm the one she uses for her release. In other words, she's just after my body... The thing is, I've let this go on because I'm actually in love with Cheena, but I can't tell her that now, when things between us have been purely physical for so long. How long can this continue? Until Cheena gets a real boyfriend......?