Zhou Qi is an ordinary high school student, living alone in a small apartment with the ache of having lost his younger sister You Ji, whose name was changed after she died. One day, a phone call from his mother shatters his peaceful routine: You Xi, the daughter of a distant relative, will be staying with him temporarily while her parents are abroad.
Shy and sensitive, You Xi has amnesia from childhood trauma. She is afraid of snow and heights, yet instinctively depends on Zhou Qi as her "big brother." As he cares for her, he helps her adjust to her new school while carefully hiding the past between them, a past buried beneath heavy snow.
When school starts, You Xi befriends the lively, straightforward A Xue, the haughty heiress Feng Jiang, with her golden hair, and Wen Yuyan, the aloof and solitary secretary of the student council. Three girls, three different paths in life, brought together by You Xi's arrival. Meanwhile, caught between student council duties and life at home, Zhou Qi gradually becomes more than just "You Ji's big brother": he becomes "everyone's student council president."
Beneath the fireworks of the summer festival, someone confesses, someone misses their chance, and someone buries ten years of unrequited love in an act of letting go. The autumn gathering is like a mirror, reflecting the lies and secrets everyone is afraid to speak aloud.
This is the story of a boy learning, after loss, how to be needed, trusted, and welcomed close again. It is also the story of a group of young people slowly growing into their own selves beneath the same roof.
The first season ends with a reconciliation over omurice. It begins with a girl clutching the strap of her schoolbag, standing outside the door and asking softly, "Excuse me, is this Zhou Qi's home?"
Theme: Meet her, create a story for her, and walk together toward the end.