He did not want to return it to her because he wanted to keep something that belonged to her.
Upon opening the bag, the sight inside took him by surprise. The pristine white dance costume looked as if it had gone through hundreds of years of aging, dull and faded, old and tattered.
Tang Song frowned as he took it out, the texture rough under his fingertips, devoid of any smoothness. With just a bit of force from two fingers, the fabric would crumble instantly.
A flash of surprise crossed his face, and he quickly thought of something. He decided to have it tested the next day to see if any chemical agents had been improperly added.
The test results came back, and indeed, a corrosive agent had been sprayed onto the costume, one specifically designed to corrode fibers. Because a small amount was used, it took several days for the costume to become what it was now.