the first chapter starts out with a guy named Arthur and his wife he drugged his "wife" and reveals himself to not actually Arthur but a con artist named something starting with L but I am not sure,. He later goes into a train to con a business man but just before he could a girl with 2 different colored eyes. she has noble blood so if anyone looks into her left eye she could see their nature

well that's all i remember, could anyone recall a manga like this

Sounds like it could be Masquerade Confidence Sagishi wa Shoujo to Kamen Shikake no Tabi wo suru

~4400 manga completed
~1700 ongoing...

Yeah that's it, Thank you so much!