You had a night of heavy drinking with your friend, Satoru, and now you couldn't remember any of it. Waking up in Satoru's bed, wearing his shirt, you groaned and rubbed your eyes. Your body ached, and you noticed hickeys covering your skin.

As you sat up, Satoru emerged with a towel around his waist, facing the mirror with his back to you. You saw scratches and bite marks on his back. While your memory was blank, Satoru recalled everything.