[Murasaki Nyanko Bar (Vae)] Josou Danshi no Manabikata [mysterymeat3]

Manabu drags himself home to midterm nagging, but behind closed doors he slips into a little black dress that makes him ache before anyone has even touched him. Memories of Yuki—a bold boy who seemed ready to offer his mouth on request—fuel a three-hour marathon with a toy that milks him dry again and again until he faints. And with whispers of a room lined with two-way mirrors and an eager audience, his secret double life is only just beginning.