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

— childhood friend mistakes his feelings for fl for her friend instead, only realizes his mistake after fl has finally moved on from him.

— husband regrets initial mistreatment of fl after he begins to steadily fall in love with her.

— fl finds herself back in time and due to her great regret in her sons upbringing she tries to repent and heal with him, ml also regrets his marital and familial issues, overall huge regret everywhere over everything.

— when kidnapped fl's mother only pays for the release of her sister and left her in the hands of those kidnappers, when she returns home she still undergoes mistreatment from her family, who will eventually regret it once they learn how much they don't know about fl.

— ex-husband regrets his divorce upon fl's sudden change in personality, appearance and need to be in her child's life, he learns their previous divorce precedings were not as simple as he assumed.

— trashy scum ml only regrets his actions after fl makes him realize his feelings towards her then disappears from his life.