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...
Um, I think I recognized 
that dog, so I'll go look for him.
Este, creo que reconozco a ese 
perro, así que iré a buscarlo.
Esto... creo que reconozco a ese 
perro, así que iré a buscarlo.
Ei, eu acho que conheço esse cachorro
 de algum lugar, eu vou procurá-lo.