In Madrid, Spain, Lucía and Xiang, two nine-year-old Chinese girls, meet at the beginning of the school year.
| Actor | Role |
|---|---|
 Daniela Shiman YangLucía | Lucía |
 Xinyi YeClaudia | Claudia |
 Ella QiuXiang | Xiang |
 Pablo MolineroJulián | Julián |
 Leonor WatlingSol | Sol |
 Carolina YusteAmaya | Amaya |
| YYeju JiShui | Shui |
| VValeria FernándezSusana | Susana |
| JJulie ZhenWang | Wang |
| QQingfei ZhuFeng | Feng |
| GGabriel 'Chino' Marín CatalánEl Escape | El Escape |
| NNatalia Espejo RomeroCris | Cris |
| AAndrea GonzálezJeni | Jeni |
| AAkram Jabrane el OttmaniMustafá | Mustafá |
| PPaula VaquerizasMarilú | Marilú |
| LLidia NavarroPsychologist | Psychologist |
 Belén FabraDoña Angelines | Doña Angelines |
| LLihua ChengMama Li | Mama Li |
| NNina ReinaHao | Hao |