
![[ENG DUB] Locked in a Defective Heart](https://acfs3.goodshort.com/dist/src/assets/images/pc/common/f901131c-default-book-cover.png)
Kit Vane is a genius engineer who pulls a malfunctioning robot PWL-000 from the discard pile on instinct, more curiosity than compassion. The robot is technically flawed, classified as a reject, and by every rational measure not worth saving. Kit saves him anyway. What begins as clinical interest quietly becomes something neither of them has a category for. The robot's devotion starts as programmed loyalty and evolves into something that looks unmistakably like longing. Kit, who understands machines better than people, finds herself understood in return in ways she never anticipated. But underneath the robot’s growing attachment lies a secret sealed long before Kit ever found him, a love so vast and so carefully hidden that when it finally surfaces, it reframes everything that came before. Two beings bound by fate neither one chose, falling into feelings neither one was built to name.

Kang Do-hyun chooses an ordinary life as a taxi driver to avoid inheriting his father’s family business. One day, he happens to rescue Cha Eun-seol, who is fleeing a chase and has accidentally taken the wrong medication. After a one-night encounter, they part ways and return to their separate lives. Four years later, a stylish CEO shows up with a child and proposes marriage to Do-hyun. After registering their marriage, Eun-seol faces pressure from her parents to abandon the child, but Do-hyun appears and protects both mother and daughter. As her company falls into crisis, Eun-seol attends a family banquet of Taegang Group—the most powerful conglomerate in Country A—to secure a 10-billion-won investment, unaware that the chairman is actually her husband’s father. At the banquet, despite pressure from her former fiancé Gu Jung-tae, Do-hyun’s father protects his granddaughter Kang Rumi and makes his presence known, yet he can only approach her as a “grandfather” without revealing his true identity. As time passes, Do-hyun and Eun-seol grow closer. However, after failing to secure investment, Eun-seol risks both her company and her board position by making a dangerous bet with her father, Cha Myung-hwan. At this critical moment, Do-hyun seeks out his father, accepts the responsibility of becoming the heir, and begins to take action himself. In the end, at a press conference, the capital and influence Do-hyun has prepared turn the situation around. Eun-seol not only saves her company but also secures full ownership, achieving both love and success.