Ji Hanchuan, a 26-year-old genius mathematician, found Sang Nuan, a 16-year-old homeless girl, hiding in a corner of the university library on a rainy night. She was soaked but holding an advanced mathematics textbook. Sang Nuan was extremely vigilant and refused to reveal her life experience, but Ji Hanchuan noticed her ability to quickly answer math problems on the wall. The school wanted to expel the homeless girl, so Ji Hanchuan temporarily decided to take her in and take her back to an off-campus apartment out of respect for her talent and compassion.
- The two were in the same room together for the first time. Sang Nuan curled up in the corner of the sofa for the night, while Ji Hanchuan worked all night, keeping a distance to make her feel at ease.
