we don't truly appreciate what we have until it's gone

— ex-husband regrets what happened to fl in their past lives together.

— 'fake' father regrets neglecting and manipulating fl cuz she finally starts standing against him, ml also regrets not getting involved in fl's life sooner.

— shitty ex-husband and mother-in-law push fl to far, ex-husband regrets letting fl escape his mental manipulation.

— emperor thinks fl is dying and deeply regrets any actions that caused her to become ill, except fl is perfectly healthy and not dying.

— ml deeply regrets divorcing fl for political? (difficult to explain) reasons, because he actually does love her.

— some of the ml's regrets mistreating fl after she 'changes' aka not seeing fl was suffering before her body possession took place.

— uncle regrets betraying and hurting fl after he comes to terms with his obsessive version of love towards her.

— dumb emperor obsesses over fl not wanting him after he rejects her, is suddenly surprised his threat of divorcing her ends with them actually divorcing.

— ex-husband neglects his wife their entire marriage only to end up regretting it when he discovers just how much she was truly in love with him.

— shitty ml mistreats and neglects fl's feelings causing her to run away, his obsessiveness towards her causes him regret in letting her go.