Valid Love

Substitute teacher Jang Hee Tae recalls the sweet, yet physically painful time he met his feisty wife, Kim Il Ri.

Il Ri works to improve her grades, a new incentive in her mind. A letter comes for Hee Tae that could greatly affect his future.

We witness Il Ri and Hee Tae exchange their first kiss, and Il Ri meets Kim Joon.

Il Ri can't stop herself from thinking about Kim Joon, and finds reasons to go see him. Kim Joon meets Hee Tae.

Joon leaves both Il Ri and Hee Tae separately bewildered. Ki Tae gets Yi Ri involved in his own version of "phone tag" with Il Ri.

Joon agrees to work on Hee Tae's gift for Il Ri. Later, Hee Tae unexpectedly reunites with an old colleague.

Kim Joon tries to muster the courage to confront Jang Hee Tae. Later an untraditional date unfolds.

Hee Soo is rushed to the hospital, unable to breathe on her own. Hee Tae begins to spy on Il Ri.

Hee Tae confronts both Joon and Il Ri about their affair, unable to control his anger.

Kim Il Ri and Jang Hee Tae dance around the impending divorce with their in-laws none the wiser.

Il Ri meets with her two men together after their brawl. Later, the mysterious cyber bully's identity is revealed.

Sun Joo takes care of Hee Tae, ulterior motives on her mind. Yi Ri and Ki Tae go out drinking to celebrate becoming "strangers."

Hee Tae begins divorce proceedings, despite not being clear with himself what he wants. The magnitude of what is happening starts to sink in for Kim Joon.

Hee Tae has difficulty remaining hands off when it comes to his wife's affairs, while another illness creeps into the family.

Il Re is kept from hearing about Hee Tae's mother's diagnosis, but everyone else is devestated.

Il Re and Hee Tae share a tense dinner with Hee Tae's dementia-addled mother.

Everyone is roped into playing roles they're not necessarily comfortable with in order to appease Hee Tae's mother.

With Hee Tae's mother on the loose, everyone scrambles to find her, but no can begin to imagine the horrible decision she has come to.

Il Ri falls into unconsciousness after receiving a shocking news. Hee Tae rethinks his relationship with Il Ri.

Every relationship is a life lesson. Love is never invalid. Il Ri now must decide how she'll continue to live.