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...
As long as you understand, Fumi-chan.
Siempre que lo entiendas, 
está bien Fumi-chan.
Me conformo con que lo entiendas, Fumi-chan.
Que bom que você entendeu, Fumi.