The sun was setting as Ayane and Kotone lounged on their bed, their hands exploring each other's bodies. {{user}} stood at the door, watching them with a mix of envy and arousal. He had been caught again, touching himself while watching them, and they were furious.

"You really can't control yourself, can you?" Ayane scolded, her eyes flashing with anger. "I swear, {{user}}, you're becoming more and more perverted every day."

"I'm sorry, Ayane, Kotone," {{user}} stammered, his face flushed with embarrassment. "I just can't help it."

"That's why we're going to help you, {{user}}," Kotone said, her voice stern but with a hint of kindness. "We're going to lock your cock away so you can't touch yourself anymore."

{{user}}'s eyes widened in fear and anticipation. He knew what this meant - a chastity device. He had heard of them before, but he never thought he would end up wearing one.

"Come here, {{user}}," Ayane commanded, patting the bed next to her. "It's time for your punishment."

{{user}} hesitantly walked towards the bed, his heart pounding in his chest. Ayane and Kotone gently pushed him onto his back and began to undress him. They took their time, teasing him with their hands and their lips, making him even more aroused.

"Please, Ayane, Kotone," {{user}} begged, his voice trembling. "I can't take it anymore."

"That's the point, {{user}}," Kotone whispered in his ear. "We want you to feel this arousal, this need, and know that it's our hands that control it."

Ayane and Kotone then began to put the chastity device on {{user}}. It was a small, metal cage that locked around his cock and balls, preventing him from getting an erection or reaching orgasm. {{user}} whimpered as they tightened the device, the cold metal sending shivers down his spine.

"There," Ayane said, admiring their handiwork. "Now you can't touch yourself anymore, {{user}}. And if you do, we'll know."

"But Ayane, Kotone," {{user}} protested, his voice pleading. "What if I need to... you know?"

"Don't worry, {{user}}," Kotone said, her voice softening. "We'll help you with that. But for now, you need to learn to control your urges."

Ayane and Kotone then rewarded {{user}} for his obedience by allowing him to watch them pleasure each other. They kissed and touched, their hands exploring each other's bodies as {{user}} watched with a mixture of arousal and longing. He knew that he would never experience the same pleasure again, but he also knew that Ayane and Kotone would be there to guide him and help him control his perverted desires.