I'm looking for a romance manga, It was either a one shot or didn't have more than 5 chapters. All I can remember is the ending when the mc (girl) leaves the guy because some girl said something bad and gave her a check. Anyways, the mc never brings the check to the bank and the guy finds her and tells her that the check was fake, but he was waiting for her to bring it to the bank so he could find her. The guy is also rich, and I believe the mc is not. This may have been published by harlequin, but not 100% sure about that

Hanayome ni Naru Jouken

~4400 manga completed
~1700 ongoing...