I believe you're referring to "Kegareboshi"!
The animation style of Kegareboshi is notable for its blend of traditional and digital techniques, with vibrant colors and detailed character designs. The series features a mix of action, drama, romance, and comedy elements, making it a thought-provoking and engaging watch. kegareboshi animation
Kegareboshi, also known as "Stigma" or "" in Japanese, is a Japanese anime television series created by Kazuya Minekura. The series premiered in 2004 and consists of 26 episodes. I believe you're referring to "Kegareboshi"