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...
I'll do my best to look for them, too.
Yo también los buscaré 
con todas mis fuerzas.
Yo también los buscaré 
con todas mis fuerzas.
Eu vou fazer o que puder
 para encontrá-los.