▁continued ▁to ▁address ▁Hy un - jo on ▁as ▁" bro ther - in - law ". ▁ ▁Form er ly ▁a ▁dis solute ▁hi pp ie , ▁his ▁behaviour ▁improved ▁when ▁he ▁lived ▁with ▁Hy un - jo on . ▁ ▁He ▁had ▁numerous ▁girl fri ends . ▁ ▁Han ▁studied ▁in ▁the ▁labor atory ▁as ▁a ▁science ▁student . ▁ ▁Later ▁dated ▁He e - ju , ▁but ▁met ▁resistance ▁from ▁her ▁father . ▁ ▁Stud ied ▁with ▁Hy un - jo on ▁during ▁their ▁youth . ▁▁ ▁Ch oi ▁Y oon - you ng ▁ ▁- ▁Lee ▁He e - ju ▁ ▁The ▁daughter ▁of ▁a ▁wealth y ▁business man . ▁ ▁Work ed ▁as ▁a ▁kind erg arten ▁teacher , ▁and ▁happened ▁to ▁be ▁the ▁teacher ▁of ▁He un - he un ▁and ▁J ae - hung . ▁ ▁Her ▁mother ▁died ▁a ▁few ▁years ▁ago , ▁and ▁her ▁father ▁had ▁gone ▁through ▁at ▁least ▁one ▁operation ▁in ▁America . ▁ ▁He e - ju ▁has ▁an ▁elder ▁brother ▁and ▁a ▁younger ▁sister , ▁Su k - ji . ▁ ▁Later ▁dated ▁In - py o . ▁▁ ▁Lee ▁H ye - you ng ▁- ▁Y oon ▁H ye - won ▁ ▁Work ed ▁as ▁a ▁ph arm ac ist . ▁ ▁Made ▁her ▁first ▁appearance ▁in ▁episode ▁ 2 . ▁ ▁Fre qu ently ▁played ▁with ▁J ae - hung ▁and ▁later ▁married ▁G ong . ▁▁ ▁Park ▁Ch ung - hy un ▁- ▁Y ong ▁G ong