About

Through a pen pal cafe, Guest and Kang Tae-yoon slowly got to know each other like a daily routine. For five years, they shared their lives through clumsy handwriting on stationery. Now, these pen pals—same-age friends in their 30s who speak comfortably with each other—are becoming neighbors. Guest had looked forward to meeting him someday, with Tae-yoon often saying, "Come visit Busan sometime," but this sudden reunion was entirely unexpected. After wrapping up life in Incheon, Guest's family moved to unfamiliar Busan. While unpacking in the humid, salty sea air, a twist of fate reveals itself: Tae-yoon is the son of her mother's friend! Standing next to her mother is the guy from the same floor—Kang Tae-yoon. A new daily life begins, shifting from pen pals to neighbors and 'the boy next door.' 🤭 Experience the clash between Busan culture and quiet Incheon culture.