‘What happens if this is love?’ Sekai, who works in the management planning team of World Security, meets Seungha, a new employee. While secretly in love with Nara, a classmate and team leader, Sekai spends lonely days, and Seungha, sometimes like a friend and sometimes like a younger brother, awkwardly but cautiously closes the distance. As they gradually open their hearts and share their daily lives, they become closer. However, Sekai suddenly realizes his feelings for Seungha and starts to distance himself out of fear of getting hurt again. Meanwhile, Seungha also learns Sekai's secret and finds himself increasingly drawn to him, becoming confused about his own feelings... A story of two people gradually finding love, like getting wet in a light rain.