Secretly, Secretly; But Unable to Hide It

That year, someone secretly wormed their way into Sang Zhi's heart and she fell in love with her brother's friend Duan Jiaxu. That older brother has beautiful peachy eyes and casually calls her a "kid". That spark of surprise when they first met made Sang Zhi want to slowly get closer to him, but the 7-year age difference felt like an insurmountable gap that she couldn't cross over. Not knowing when it started, the crush buried at the bottom of her heart sprouted, and slowly, it spread into his heart too...