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기쁜 우리 좋은 날
A developer risks everything to stop a powerful corporation from taking "Joy," the AI she built.
Eun Ae, struggling with her AI project, finally finds hope as she secures a major investment offer.
Terminally ill Kang Su summons Gyeol to Korea while Ji Hun confesses his love to Eun Ae after a secret deal.
Eun Ae is shocked by the blocked server and Kang Su's family is unsettled by Gyeol's sudden return.
Gyeol mistakes Eun Ae for a pickpocket, and Kang Su prepares a major announcement for his family.
Kang Su declares a succession race for Kangsu Group, and Eun Ae visits the office to reclaim her company.
Gyeol starts working at Kangsu Construction to compete with Min Ho and Eun Ae begins a protest to reclaim Joy.
Eun Ae finds her father working as a cleaner at Kangsu Construction and Gyeol starts working as the TF leader.
Eun Ae receives a notice from Kangsu Construction and seeks help to reclaim Joy after her failed negotiation.
Eun Hyeong faces a crisis, and Eun Ae helps Yeong Hwa, then sneaks into Kangsu Construction to reclaim Joy.
Eun Ae is detained for sneaking into Kangsu, and Seong Jun tries to settle the matter without Yeon Ja knowing.
Gyeol offers Eun Ae an internship at Kangsu, and Yeon Ja begins to grow suspicious of Seong Jun's behavior.
Eun Ae and Seong Jun confess the truth to Yeon Ja, and Eun Ae starts her first day at Kangsu as an intern.
Eun Ae demands her share of the money from Ji Hun, and Seung Wu carries out his revenge against Eun Nim.
Yeon Ja is upset over Eun Hyeong's unemployment and Eun Ae is flustered when she learns about the competition.
Yeon Ja gets into a nerve war with Su Jeong at Kangsu, and Eun Ae learns about Gyeol's career as an architect.
Eun Ae sneakily views photos on Gyeol's computer, and Eun Hyeong shocks Ji Seon by skipping his job interview.
Gyeol takes a drunk Eun Ae home, and Seung Ri feels jealous while Seung Wu gets a new collaboration offer.
Su Jeong gets caught searching Yeong Hwa's room, and Ji Seon asks Yeon Ja for money to help Eun Hyeong.
Eun Ae finds Gyeol playing cards at a senior center, and Min Ho takes a drunk Seung Ri home after dinner.
Eun Ae has a conflict with Yeon Ja over her money, and Gyeol makes a photo folder of Eun Ae on his computer.
