S1E1 - I Know What You Did Last Summer
As high schoolers, Kook Yeon-su and Choi Ung give a documentary crew a peek into their lives. Ten years later, they've gone their separate ways.
S1E2 - 1792 Days of Summer
Yeon-su and Ung reunite for the first time in five years when she shows up at his door with a proposal to work together on an art project.
S1E3 - 10 Things I Hate About You
Eager to film a follow-up documentary, Kim Ji-ung sets out to persuade Yeon-su and Ung. But getting them to agree proves to be a challenge.
S1E4 - The Boy, or the Girl, We Liked Then
Yeon-su and Ung's squabbles begin even before the cameras start rolling. Ung refuses to dignify an infuriating plagiarism accusation with a response.
S1E5 - A Secret That Can’t Be Told
Ji-ung recounts how he and Ung became friends in their childhood. Yeon-su wants to apologize to Ung, but can't quite bring herself to do it.
S1E6 - Pride and Prejudice
Ung wakes up on the morning of the live drawing show with a few gaps in his memory. Watching him at work, Yeon-su sees an unfamiliar side of him.
S1E7 - Catch Me If You Can
Ung and Yeon-su attempt to run away from having to see each other, but wind up in the same place anyway. NJ stands up to her cyberbullies.
S1E8 - Before Sunset
A forced vacation commences for Yeon-su and Ung when the documentary crew traps them at a mountain retreat. Awkward tensions run high between the pair.
S1E9 - Just Friends
When she doesn't hear from Ung after their return from the retreat, Yeon-su decides to confront him. He has a disorienting response for her.
S1E10 - Hello, My Soul Mate
With his mother back in town, Ji-ung stops going home so he can avoid seeing her. Watching NJ and Ung go on a date vexes Yeon-su to no end.
S1E11 - Our Nights Are More Beautiful Than Your Days
Ahead of the final day of filming, gossip about Ung and NJ causes a stir. Ji-ung receives pointed advice about his documentary edit.
S1E12 - Begin Again
For Ung and Yeon-su, a new beginning is equal parts sweet and clumsy. When NJ bumps into Ji-ung, she invites him out for a drink.
S1E13 - Love Actually
After soliciting dating advice from a co-worker, Yeon-su acts out of character in front of Ung. Meanwhile, Ji-ung takes some time to himself.
S1E14 - Life Is Beautiful
Ung asks Yeon-su a question that's difficult for her to answer. As Lee Sol-i deals with an unwanted surprise in her bar, Gu Eun-ho happens to swing by.
S1E15 - Three Idiots
A noticeably down Ji-ung pours himself into his work instead of going home. Ung waits for Yeon-su to come and see the final night of his art exhibit.
S1E16 - Our Beloved Summer
Ready to pursue his next dream, Ung sets his sights on studying overseas. When he asks Yeon-su to join him, she has a tough decision to make.
