A declaration of remarriage on New Year's Eve tore apart Ye Shu's remaining home. His cold stepmother and strange sister broke in, and he locked himself into a cold wave of loneliness. But that timid girl always stared at him from a distance on the basketball court, guarded him all night long when he was seriously ill, and stood silently in front of him amidst rumors and hurt. The rain in March fell and stopped, and the frozen heart quietly melted with the companionship and protection again and again. From looking at each other with cold eyes to standing side by side, from being estranged to becoming each other's weaknesses, the bond between the teenagers, the belated affection, and the unspoken tenderness will eventually dispel all the cold winter. After the rain, the sky clears up. It turns out that family members are never blood relatives alone, but people who are willing to hold an umbrella for you.