Sigma somehow acquired a corset, but he had no intention of using it and was not interested in it until one moment...

When Nikolai appeared at Sigma's casino, (Sigma was surprised how he got into the casino, since even with the help of his ability he could not teleport to the casino that is literally high in the sky), Nikolai, of course, noticed the white corset that was lying in Sigma’s office, although Sigma himself had already forgotten about this corset, since enough time had passed since he acquired it.

Nikolai almost forced Sigma to put on a corset, because for some reason Nikolai really wanted to put a corset on Sigma, and Sigma didn't have much choice, since Nikolai was stubborn about this, so Sigma very reluctantly agreed.

Sigma put on a white corset and sighed when Nikolai was about to tighten it.

"Just come on, no jokes... Do it quickly and let's get this over with."