Question: Who directed this 2001 South Korean romantic comedy film starring Jun Ji-hyun and the actor from "Hello Ghost" (2010)?

Context paragraphs:
Kim Young-tak: Kim Young-tak (born 1976) is a South Korean film director and screenwriter.  Kim wrote and directed the comedy film "Hello Ghost" (2010).  The comedy was a local hit - the 9th highest grossing Korean film in 2010, and won him the Best New Director (Film) at the 47th Baeksang Arts Awards in 2011.

White Valentine: White Valentine () is a 1999 Korean romantic film directed by Yang Yun-ho.  It stars Park Shin-yang with Jun Ji-hyun in her movie debut.

Il Mare: Il Mare (; lit.  "time-transcending love") is a 2000 South Korean film, starring Jun Ji-hyun and Lee Jung-jae, and directed by Lee Hyun-seung.  The title, "Il Mare", means "The Sea" in Italian, and is the name of the seaside house which is the setting of the story.  The two protagonists both live there two years apart in time, but are able to communicate through a mysterious mailbox.

The Legend of the Blue Sea: The Legend of the Blue Sea () is a 2016-2017 South Korean television series starring Jun Ji-hyun and Lee Min-ho.  Inspired by a classic Joseon legend from Korea's first collection of unofficial historical tales about a fisherman who captures and releases a mermaid, this drama tells the love story of a con-artist and a mermaid who travels across the ocean to find him.  It aired on SBS every Wednesday and Thursday at 22:00 (KST) started from 16 November 2016 until 25 January 2017.

Cha Tae-hyun: Cha Tae-hyun (born March 25, 1976) is a South Korean actor, singer, television personality radio DJ and director.  He is best known for his lead roles in the box-office hit comedies "My Sassy Girl" (2001), "Scandal Makers" (2008) and "Hello Ghost" (2010) as well as the television series "Jeon Woo-chi" (2012) and "The Producers" (2015).  He made his directorial debut with the variety-drama "Hit the Top" (2017), in which he also stars.

Jun Ji-hyun: Jun Ji-hyun (born Wang Ji-hyun on 30 October 1981), also known as Gianna Jun, is a South Korean actress.  She rose to fame for her role as The Girl in the romantic comedy "My Sassy Girl" (2001), one of the highest-grossing Korean comedies of all time.  Other notable films include "Il Mare" (2000), "Windstruck" (2004), "The Thieves" (2012), "The Berlin File" (2013) and "Assassination" (2015).

My Love from the Star: My Love from the Star (; literally "You Who Came from the Stars") is a South Korean television series starring Jun Ji-hyun, Kim Soo-hyun, Park Hae-jin and Yoo In-na in lead.  Written by Park Ji-eun, it is a romantic fantasy story about an alien who landed on Earth in the Joseon Dynasty and, 400 years later, falls in love with a top actress in the modern era.  It aired on SBS from December 18, 2013 to February 27, 2014 on Wednesdays and Thursdays at 22:00 for 21 episodes; the production company extended the original 20-episode run with one episode, due to high viewers' demand.

My Sassy Girl: My Sassy Girl (Korean: 엽기적인 그녀 ; literally, "That Bizarre Girl") is a 2001 South Korean romantic comedy film directed by Kwak Jae-yong, starring Jun Ji-hyun and Cha Tae-hyun.

Windstruck: Windstruck (; lit.  "Let me introduce (you to) my girlfriend") is a 2004 South Korean romantic comedy.  It stars Jun Ji-hyun, Jang Hyuk, and was directed by Kwak Jae-yong.  The film held its premiere in Hong Kong, attended by Jang and Jun, on 28 May 2004, being the first Korean film to do so.  It was released on June 3, 2004 by CJ Entertainment and ran at 123 minutes.

The Berlin File: The Berlin File (; lit.  "Berlin") is a 2013 South Korean spy action thriller film written and directed by Ryoo Seung-wan.  Ha Jung-woo stars as a North Korean agent in Berlin who is betrayed and cut loose when a weapons deal is exposed.  Together with his wife, a translator at the North Korean embassy in Berlin played by Jun Ji-hyun, they try to escape being purged, with Ryoo Seung-bum and Han Suk-kyu playing North and South Korean operatives on their trail.

Supporting paragraphs: Cha Tae-hyun My Sassy Girl
Answer: Kwak Jae-yong