Mitsuki, my sister, is bad at talking to people she doesn't know well and gets embarrassed when looked at. However, ever since she started her beloved cosplay recently, she's become incredibly proactive, like a completely different person. Today, we're having a cosplay photoshoot with me and my friend, but the atmosphere gradually turns sleazy. She ends up getting her pussy penetrated, a cock twisted into her deepest vagina, and shakes all over as she reaches orgasm.
