Manhole

Pil is about to lose the love of his life to a stranger, Jae Hyun and stumbles upon a time-traveling manhole.

Pil realizes he’s gone back in time to his school days. He takes the chance and fights Soo Jin’s first kiss.

Pil’s new past has changed everything but Soo Jin’s wedding. He’s now a thug, and Soo Jin gets kidnapped.

Pil wakes in the summer after high school. Soo Jin ends up with an unfamiliar man. Pil tries to change that.

Pil stops the present Soo Jin from marrying Jae Hyun. He meets his father’s soul and realizes he’s dead.

Soo Jin learns Seok Tae has been possessed by Pil's spirit. Doctors say Pil may not make it through the night.

Pil confesses his love for Soo Jin and takes her out. This reminds Jin Sook of her hidden feelings for Pil.

It's Jae Hyun's proposal day. Pil is disappointed at Soo Jin's coldness and goes to have drinks with Jin Sook.

Pil returns to the past to find the letters Jin Sook took. Jin Sook gets caught stealing Pil's letter.

Soo Jin prepares to leave to study in the UK and gets closure. Pil can’t choose between Soo Jin and Jin Sook.

Soon Tae is with Jin Sook, and Soo Jin with Jae Hyun. Pil returns to the manhole as Soo Jin’s not with him.

Pil asks Seok Tae to re-open the manhole. Young Ju approaches Soo Jin. Jae Hyun suspects Soo Jin and Pil.

Goo Gil gets assaulted, and Pil accuses Jae Hyun. Soo Jin finds something suspicious in Jae Hyun's belongings.

Soo Jin gets into an accident, and Pil begins to dig into the manhole to save Soo Jin. The others join in.

Pil explains to Soo Jin they have traveled in time. The police go after Jae Hyun for the random attacks.

Pil tries to rescue Soo Jin, and Jae Hyun stabs Pil. Soo Jin returns to her wedding with Jae Hyun.