Baek Inhye got flung to the past after an accident, not long after Ryu Sunjae's death. She went to the past earlier than Sol did, and met Sunjae earlier. What she doesn't realize is that time travelling has its rules, and what she does in the past will have a butterfly effect. Ryu Sunjae × OC a little bit AU

Young budding psychiatrist, Han Yeoreum, gets involved with the Bok family as she got closer to Bok Ina. The whole family wonders how that happened, and grew some interest in her. But for Bok Gwiju, she's a little bit more special... Bok Gwiju × OC

Jooshin High had an anonymous blogger that spills the school's hottest tea and gossip. It hasn't updated since three years, but at the arrival of Kang Ha, it returns. Kang Ha takes interest in Shin Ahyoung, the girl that seemed different from everyone else. XOXO, Gossip Girl Kang Ha × OC Hierarchy, but a bit AU since I didn't like how it went...

Cha Hyunsu found a recluse girl living at room 1304. She was alive and had survived everything on her own so far. Lee Eunhyeok wants her to come down and be together with the survivors, while Geum Bora is persistent she'll survive alone. And while the world is ending, she found that maybe living with humanity wasn't that bad after all. Lee Eunhyeok × OC

During the Eclipse, Ryu Sunjae was given a second chance to go back to the past to the woman he loves the most, but he is flung to the monarchy era as the palace cook's son without his memories of her. But of course, no matter what timeline they're in, they are bound to find each other again. Ryu Sunjae × OC Saeguk AU

Going through a heartbreak from Ryu Sunjae, Baek Inhye finds herself getting closer with the resident flirty rocker, Kim Taesung. She may avoid him sometimes, but there's something about him that makes her go back every time... Kim Taesung × OC

Oh Jukyung is an extra character that always wonders why Secret's author sucks at writing. Her twin brother, Oh Namjoo is always portrayed like a bad boy, and every time Jukyung sees him interact with Yeo Juda it's always cringey. She accidentally discovers that she can't do things she wanted to do, and despises the author who just makes her an emotionless girl. In the shadows, she's just a simple girl who likes music, sports, and arts. She thought she couldn't change her fate, until she discovered that Eun Danoh changed her fate with Haru. She wishes she could change hers, but what will it cost?

Lee Seul is the Crown Princess of The Kingdom of Corea and is the little sister of the King, Lee Gon. She liked Jo Yeong since they were kids, but their relationship became undefineable as they spent five years apart. They grew up. With the Parallel Universes colliding, she meets Jo Eunsup, Yeong's counterpart from another world. He has all of the personality Seul wanted Young to have, but as reality is defined, Seul gets in a dilemma. Would she choose the reality she wants, or the reality she has?