Operation Proposal

Kang Baek Ho is forced to accept that his own cowardice prevented him from confessing to his first love, Yi Seul, when he watches her marry another man. The Conductor gives him a chance for a do-over.

Back in high school, Baek Ho tries to make it up to Yi Seul by getting her movie tickets for a date.

Baek Ho changes his pitch during a crucial game, in the hopes of avoiding an injury that ruined his baseball career. A new coach for the high school team arrives.

Having an insight on the future, Baek Ho tries to help his friends realize their true passions while in high school, before it's too late.

Baek Ho is envious of Joo Tae Nam's ability to proclaim his love for Yoo Chae Ri. His actions begin to drastically affect his future.

Yi Seul's grandfather helps Baek Ho regain his courage and strength to stand on the pitcher's mound.

Baek Ho decides to let go of Yi Seul so that she can fulfill her own dreams of becoming a sports agent.

Baek Ho goes back to his military days in the hopes of seeing Yi Seul when she visits him at the base, but things don't work out as planned.

With Chan Wook's help, Baek Ho wonders whether he truly deserves Yi Seul over Jin Won.

Baek Ho discovers that despite successfully getting Yi Seul as his girlfriend in the past, he made an unforgivable mistake that led to their breakup.

With all the attempts at winning Yi Seul's heart over, what Baek Ho doesn't expect is for them to grow apart...and for her to possibly have a change of heart.

Baek Ho's mother unwittingly causes friction between him and Yi Seul. Jin Won's dreams of forming a Third League begin to come true.

The Conductor tries to give Baek Ho a chance to completely forget about Yi Seul, but his love for her is too strong. The friends all head to the beach for their New Year's Eve ritual.

Baek Ho's constant time traveling drastically changes the future when he reaches one where Yi Seul no longer exists.

The Conductor's past is revealed, and Baek Ho acts to reverse Yi Seul's death.

Though Baek Ho wakes up from his coma, he completely forgets Yi Seul, his best friend and love.