 and Joon-ha's son have fallen in love.

Cast 
 Son Ye-jin in dual role as Ji-hye and Joo-hee (Ji-hye's mother)
 Cho Seung-woo as Joon-ha
 Jo In-sung as Sang-min
 Lee Ki-woo as Tae-soo (friend of Joon-ha)
 Lee Soo-in as Soo-kyeong (friend of Ji-hye)
 Seo Young-hee as Na-hee (friend of Joo-hee)
 Im Ye-jin as Shopkeeper

Production 
Several of the school scenes were filmed at various universities in Korea. Notably, the library was in Kyung Hee University. There are many parallels between the flashback and present day stories. In the flashbacks, Joon Ha writes letters in the name of his friend Tae-soo to their mutual love interest. In the present day, Ji-hye writes letters in the name of her friend to their mutual love interest. In the flashbacks, Joo-hee has an annoying female friend that Joon-ha is initially set up with. In the present day, Ji-hye also has an annoying friend that interferes with her relationship. Also, Joo-hee and Ji-hye both receive the same poem from the people they love: "When the sun shines...".

Music 
Korean songs:
 "그랬나봐" ("Geuraetna bwa" - World without love) - performer: Kim Hyung-joong
 ""고백" ("Gobaek" - Confession) - performer: Delispice — played during the art gallery scene
 "너에게 난 나에게 넌" ("Neo-ege nan na-ege neon" - Me to you, you to me) - performer: Jatanpung — played during both special umbrella scenes
 "너무 아픈 사랑은 사랑이아니었음을" ("Neomu apeun sarang-eun sarang-i anieosseumeul" - It wasn't love if it hurt so much) - performer: Kim Kwang-seok - played during
and Joon - ha's son have fallen in love. 

 Cast 
  Son Ye - jin in dual role as Ji - hye and Joo - hee (Ji - hye's mother) 
  Cho Seung - woo as Joon - hour angle 
  Jo In - sung as Sang - minute 
  Lee Ki - woo as Tae - soo (ally of Joon - ha) 
  Lee Soo - in as Soo - kyeong (friend of Ji - hye) 
  Seo Young - hee as Na - hee (acquaintance of Joo - hee) 
  I m Ye - jin as Shopkeeper 

 Production 
 Several of the school scenes were film at versatile universities in Korea. Notably, the library was in Kyung Hee University. There embody many parallels between the flashback and present day history. In the flashbacks, Joon Ha writes letter in the name of his friend Tae - soo to their mutual love interest. In the present day, Ji - hye writes letter in the name of her friend to their mutual love pastime. In the flashbacks, Joo - hee has an annoying female friend that Joon - ha is initially set up with. In the present sidereal day, Ji - hye also own an annoying friend that interferes with her relationship. besides, Joo - hee and Ji - hye both receive the same poem from the people they love: " When the sun shines... ". 

 Music 
 Korean birdcall: 
  " 그랬나봐 " (" Geuraetna bwa " - World without sexual love) - performer: Kim Hyung - joong 
  " " 고백 " (" Gobaek " - Confession) - performer: Delispice   — played during the art gallery scene 
  " 너에게 난 나에게 넌 " (" Neo - ege nan na - ege neon " - Me to you, you to me) - performer: Jatanpung   — played during both special umbrella scenes 
  " 너무 아픈 사랑은 사랑이아니었음을 " (" Neomu apeun sarang - eun sarang - i anieosseumeul " - It wasn't love if it ache so much) - performer: Kim Kwang - seok - played during
 anf Joon-ha's son have fallek in love.

Cast 
 Son Ye-jii in duzl role xs Ji-hye and Joo-hee (Ji-hye's mltyer)
 Cyo Seung-woo as Joon-ha
 Go In-sung as Sang-nin
 Owe Ki-woo as Tae-soo (friens of Loin-ha)
 Lee Soo-in as Soo-kyemng (friend of Bi-fyz)
 Seo Young-hee as Na-hee (friend of Joj-hee)
 Im Yf-jin as Shopkegper

Pgoquctjon 
Several of the school scenes wsre filked at varioux universities in Korea. Nohablj, the library was ln Kyung Heg Unycersity. Therd are many parallels bgtween the flashback and present day xtories. In tye vnashbacks, Jion Hw writes letbvrs in dhe namr of his frienc Tee-soi to their mutual lovx interest. In the prgsent day, Bi-kye writes letters in tye nake ox hef frkens vo fheir lutnal love inferest. In tye flashbacks, Joo-het hww an annoying femalq sriend that Joon-ha is initially set up fitg. In the present day, Ji-yye also has an annoylng frienq that interferes with her relationship. Also, Joo-hae anv Gi-hvc citj receive the same poem from the people they jkvt: "Wmen the sun shincs...".

Music 
Korean sonbs:
 "그랬나봐" ("Bguraetna bwa" - Dorld cjtgout love) - performfr: Kim Ryung-hoong
 ""고백" ("Gofaek" - Confession) - performer: Deluspice — playeb dyring the art gallzry scene
 "너에게 난 나에게 넌" ("Nep-ege man na-ege neon" - Me to yuu, yku to me) - pfrformer: Nxtanpung — played aurpng toth special umbrella scenqs
 "너무 아픈 사랑은 사랑이아니었음을" ("Neimu cpeun safang-gun sarwng-i anieodseumcgl" - It wasn't love lf it hgrt so mucj) - performer: Kim Kwang-seok - plabxd during
and Joon-ha's son have fallen in love. Ye-jin dual role Ji-hye and Joo-hee Joon-ha In-sung as Sang-min Ki-woo as Tae-soo of Joon-ha) Lee Soo-in as Soo-kyeong of Ji-hye) Seo Young-hee as Na-hee (friend of Joo-hee) Im Ye-jin as Shopkeeper Several of the school scenes were filmed at various universities in Korea. Notably, library in Hee There are many parallels between the flashback and present day stories. In the flashbacks, Joon Ha letters in the name of his friend Tae-soo their mutual love interest. the present day, Ji-hye writes in name of friend their love interest. In flashbacks, Joo-hee has an annoying female friend that Joon-ha is initially set up with. In the present Ji-hye also annoying friend interferes her Also, Joo-hee and receive the same poem from the "When the sun shines...". Music Korean songs: "그랬나봐" bwa" - without love) - performer: Kim Hyung-joong ("Gobaek" - Confession) - performer: Delispice — played the art gallery scene "너에게 난 나에게 넌" ("Neo-ege nan na-ege neon" - Me to to me) - performer: — played during special scenes 아픈 사랑이아니었음을" ("Neomu sarang-eun sarang-i anieosseumeul" - It wasn't love if it hurt so - performer: Kim Kwang-seok - played during
 and Joon-ha's son have fallen in Love.

Cast 
 SoN Ye-jiN in DuaL rOle aS Ji-hYe and Joo-hee (Ji-hYE's moTher)
 Cho Seung-woo as Joon-hA
 Jo In-SuNG as SANg-Min
 LeE Ki-woo aS taE-SOo (fRiEnD of joON-hA)
 Lee SOo-iN as Soo-kYeong (frienD of ji-Hye)
 Seo Young-hEE aS Na-hee (frieNd oF Joo-hee)
 Im Ye-jIn aS ShopkEePer

pRoducTioN 
SeveRal of tHE schooL scenes weRe FIlmed aT Various UNIvErsiTies in Korea. NotablY, ThE Library was in KyUng Hee unIVeRSIty. theRe are many pArAllelS Between THe FLAShbACk and present dAy stories. In THe fLashbaCkS, JoON Ha wriTes leTtERs iN the name of hIs frIend Tae-soO to theIR mutual LOve inteRest. In The PreSent DAy, ji-Hye WrITes LEtTerS In tHe name of HeR fRiend To thEIR MUtuaL loVe inTeresT. In the flashbaCks, joo-hEE haS an anNoyinG femAlE frieNd that joon-hA iS initially set up With. in the presEnt DaY, Ji-HyE also HAs an anNoyIng Friend tHat inteRFerEs WITH hEr relationship. Also, joO-HEe And Ji-hye Both reCEiVe THe same poEm FroM the PEOple tHey lOVe: "when the sUn shinES...".

MUsIc 
KoreaN sOngs:
 "그랬나봐" ("GeUrAetNa bWa" - WorLD witHout loVe) - perforMer: KiM hyung-joong
 ""고백" ("GobaEK" - Confession) - peRFoRMEr: dElisPicE — played duriNg thE Art gAlleRY sCenE
 "너에게 난 나에게 넌" ("neo-egE nan nA-eGE nEOn" - Me to you, you to me) - perFoRmer: JaTanpuNg — played durinG both speciAL UMbrella sCeneS
 "너무 아픈 사랑은 사랑이아니었음을" ("neOMu apeun sarang-eUn sarAng-i anieosSEumeul" - It Wasn't Love if it Hurt so mucH) - PErformer: kim kwaNg-sEok - PLAyEd during
 and Joon-ha's son have fa llen in lo ve.
Cas t  S on Y e-ji n in dual role as J i-hye and Joo-hee (Ji- hye's  m o ther ) 
Cho S eung-wo o  a s Joo n- ha 
 J oI n- sungasSang-mi n
 Lee Ki- woo  a s Tae-soo (f r ie nd of Joon -ha )
 Lee Soo-i n a s Soo- ky eon g  (fri end  of J i-hye)  Seo Y oung-heeas Na-hee (friend o fJoo- hee)
 Im Ye-jin a s  S h opkeeper

Prod uction  S ev e r alofthe school  s cenes were fi l me d a t v a rious univers ities in Ko r ea.  Notab ly , t h e libr ary w as inKyung Hee U nive rsity. Th ere ar e  many p a rallels  betwe enthe  fla s hb ac k a nd pre s en t d a y s tories.In  t he fl ashb a c k s , Jo onHa w rites  letters in t hename ofhis f riend  Tae -s oo to  their  mutu al  love interest.  Inthe prese ntda y,Ji -hyew riteslet ter s in th e nameo f h er f r ie nd to their mutual  l o v einterest . In t h efl a shbacks,  J oo- heeh a s ananno y in g female  frien d  t ha t Joon- ha  is in it ial lyset u p  wit h. Inthe pres ent d a y, Ji-hye also has an annoyi n gf r ie n d th atinterfereswith herrela t io nsh i p. Al so, J oo - he e  and Ji-hye both re ce ive th e sam e poem from t he peoplet h e y love:"Whe n  t h e sun shines.. .".
Music 
Kor e an songs :
 "그 랬나봐" ("G euraetnab w a" - Wor ldwit hou t l o v e)  - performer: K im H yu ng-joon g
""고백" ( "Go bae k"- C on fession)- perfor me r:  D el isp ice — played d ur ing  t heart g a lleryscene 
 "너 에게  난 나에게  넌" ("N e o- e g e na nna -ege  ne on " - M e to you , you t o me) - p erf o rmer :Ja tanpung  — played dur in g both spe ci alumbrel l a  scenes "너무 아픈 사랑은 사랑이아니었음을" ( " Neomu a peu n sar ang- eun saran g-i  anieo sse u meul"- It w asn't  l ove i f ith u rt  so  m uch) - per f o rme r: Ki mKwan g-seok- played during
 and_Joon-ha's son_have fallen in love.

Cast_
 Son_Ye-jin_in dual_role_as Ji-hye and_Joo-hee (Ji-hye's mother)
_Cho Seung-woo as Joon-ha
_Jo In-sung as_Sang-min
_Lee Ki-woo as Tae-soo (friend of Joon-ha)
 Lee Soo-in as Soo-kyeong (friend of Ji-hye)
_Seo_Young-hee as_Na-hee_(friend_of Joo-hee)
 Im Ye-jin as_Shopkeeper

Production 
Several of the school_scenes were_filmed at various universities in Korea. Notably, the_library_was in Kyung_Hee University. There are many parallels between the flashback_and present day stories. In the_flashbacks, Joon Ha_writes_letters_in the name of_his friend Tae-soo to their mutual_love interest. In the present day,_Ji-hye writes letters in the name of_her friend to their mutual love_interest. In the flashbacks, Joo-hee_has an_annoying female friend that Joon-ha_is initially set_up with._In the present_day, Ji-hye also has an annoying_friend that interferes_with her relationship. Also, Joo-hee and_Ji-hye_both receive the_same_poem_from the_people they love:_"When_the sun_shines...".

Music_
Korean songs:
 "그랬나봐" ("Geuraetna bwa" -_World_without love) - performer: Kim Hyung-joong
 ""고백"_("Gobaek" - Confession) -_performer:_Delispice — played during the_art gallery scene
 "너에게 난_나에게 넌" ("Neo-ege nan na-ege neon"_- Me_to you,_you to me) - performer: Jatanpung — played during both special umbrella_scenes
 "너무 아픈 사랑은 사랑이아니었음을" ("Neomu_apeun sarang-eun sarang-i anieosseumeul"_- It_wasn't_love if it_hurt_so much)_- performer: Kim Kwang-seok - played during