Seventeen-year-old Duan Bowen has carried the weight of losing his mother from a young age and grows wary of his stepmother. When a new teacher arrives at his school, Li Er, her gentle approach and dedication stand out even before he fully understands the impact she will have on his life. Li Er teaches with patience, and despite a disability in her left ear, she helps her students succeed with kindness and clarity. As Duan Bowen slowly opens up, he finds himself drawn to this compassionate young woman, keeping his feelings private while he quietly follows her and they connect on several rainy days. Li Er invites him into her world, encouraging him to speak about his troubles and even guiding him to talk about the difficulties she experiences in her own left ear. Just as that intimate moment builds between them, Duan Bowen’s path diverges when he encounters Li Er’s fiancé, Zhang Yang, a reminder that affection and obligation can clash in surprising ways.
Behind the scenes and beyond the teacher-student bond, Duan Bowen unknowingly shares a deeper history with Yu Chizi, his childhood playmate who also harbors a crush on him. Yu Chizi understands his attraction to Li Er, adding a layered tension to the story as old friendships intersect with new feelings. In the second year of high school, Yu Chizi uncovers another layer of complexity when she learns that her best friend, Si Jiali, has had a private encounter with Duan Bowen and has a hidden secret to hide. The revelation shocks the school community and Yu Chizi seizes a moment to expose it by photographing Si Jiali and Duan Bowen sharing a hug at a bar, posting the image on the school talk page. The fallout is swift: Si Jiali is reprimanded and expelled, a consequence that ripples through the lives of everyone involved and tests the loyalties and friendships that underpin their teenage world.
To stir feelings of jealousy in Duan Bowen, Yu Chizi makes a bold move by kissing Heng Dao, a boy who harbors his own crush on her. Heng Dao responds to the moment with ambiguity, and the relationship web becomes even more tangled as the school’s social dynamics spiral. The sequence of confrontations—Duan Bowen’s direct talk with Yu Chizi about the situation, Yu Chizi’s calculated innocence, and his reluctant forgiveness—drives the core of the narrative. What unfolds is a nuanced portrait of adolescence marked by longing, miscommunication, and the blurred lines between friendship and love, all set against the rainy-day motifs that thread through the film’s emotional atmosphere.
