Hyeon Jin and Tae Hyeong’s first encounter leaves them with the worst possible impressions of each other—certain they will never cross paths again. Fate proves otherwise when a sudden tragedy leaves their young nephew, U Ju, orphaned, forcing the two reluctant in-laws to raise him together. Thrust into unfamiliar roles as co-parents, they struggle through grief, responsibility, and the chaos of daily life, slowly learning how to orbit one another. Tae Hyeong, a photographer who clings to structure and control, finds his carefully ordered world upended after his brother’s death. As life with U Ju and his sister-in-law begins to settle into a fragile routine, unexpected feelings take root—quiet at first, then impossible to ignore. Hyeon Jin has spent her life devoted to her older sister, and after losing her, she channels all her love into caring for U Ju. Co-parenting with the unreliable Tae Hyeong is far from easy, yet over time, she starts to see him differently. Caught between duty, grief, and growing affection, both adults must decide whether love has a place in the fragile family they are learning to build.