Steal Pink

"No matter how much you fly or crawl, nobles are nobles, and commoners are below them!"

In the capital of a country built on a class society, the "Black Knight" appears, targeting only the most venerable noble families and stealing their seals and treasures. While the entire capital is abuzz with the Black Knight, Alec, heir to the Count Diocles family, is busy pursuing a secret hobby. While enjoying his usual time with a man, Alec locks eyes with the Black Knight and pursues him, but fails to catch him. Worried that the Black Knight will expose his scandalous private life, Alec pursues him and encounters Asha, a commoner who catches his eye...

(Source: Lezhin, translated)