Hayate Ayasaki's first love, though named Athena Tennousu, has lost her memories and now lives as a child named Alice. Setting aside the reason why all this happened, episode 3 follows the lonely young Athena Tennousu, now nicknamed "A-tan," and Hayate as they get wrapped up in a bit of a criminal incident...
Y-Yes, I'm glad we 
found her so quickly.
A-así es. ¡Qué bueno que 
la encontramos pronto!
E-Es verdad. Me alegro de que la hayamos encontrado tan pronto.
S-Sim, que bom que 
encontramos tão rápido.