▁l ament ▁over ▁her ▁pain ful ▁break up , ▁as ▁she ▁gets ▁diagn osed ▁with ▁early ▁on - set ▁Al z heimer ' s , ▁a ▁very ▁unlikely ▁disease ▁for ▁a ▁ 3 0 - year - old ▁woman . ▁Ji - hy ung ▁happens ▁to ▁learn ▁the ▁shock ing ▁fact , ▁and ▁he ▁breaks ▁off ▁his ▁eng agement ▁only ▁two ▁days ▁before ▁the ▁wed ding ▁to ▁return ▁to ▁his ▁ex - g irl friend . ▁Despite ▁veh ement ▁opposition ▁from ▁his ▁parents ▁and ▁even ▁from ▁Se o - ye on ▁herself , ▁he ▁never ▁gives ▁up ▁on ▁her ▁and ▁mar ries ▁her ▁without ▁delay . ▁The ▁dot ing ▁husband ▁is ▁devoted ▁to ▁taking ▁care ▁of ▁his ▁a iling ▁wife , ▁who ▁is ▁losing ▁her ▁ability ▁to ▁remember . ▁Despite ▁her ▁dist ress ing ▁condition , ▁the ▁couple ▁tries ▁to ▁hang ▁on ▁to ▁love ▁and ▁experience ▁it ▁to ▁the ▁end . ▁They ▁have ▁a ▁baby ▁girl ▁and ▁find ▁happiness ▁in ▁their ▁married ▁life ▁from ▁time ▁to ▁time , ▁even ▁though ▁both ▁are ▁well ▁aware ▁that ▁a ▁trag ic ▁end ▁a wa its ▁them . ▁ ▁Cast ▁So o ▁A e ▁as ▁Lee ▁Se o - ye on ▁Han ▁Bo - ba e ▁as ▁young ▁Se o - ye on ▁Kim ▁R ae - won ▁as ▁Park ▁Ji - hy ung ▁Lee ▁Sang - wo o ▁as ▁J ang ▁J ae - min , ▁Se o - ye on ' s ▁cousin ▁Je ong ▁Yu - mi ▁as ▁N oh ▁Hy ang - gi