My Ex-Husband Sent Me A Second Chance Love Letter

just three months into sayuki's marriage, tragedy struck. when she comes home early one day, she hears her husband and another woman speaking sweet nothings to each other in their bedroom. without a moment's hesitation, sayuki files for divorce and decides to have a fresh start, giving up on love and marriage. a few years pass and a guy at work starts talking her up (ml, on the cover). but before she has time to worry about him, she begins receiving love poems from her ex-husband! what happened, and why is he suddenly trying to act all romantic?!