During Golden Week, Hayate, Nagi, and Maria take a trip to Mykonos in the Aegean Sea. Hayate asks Nagi to come outside, but she denied him instantly, though she gives in to Hayate after he sulks. Elsewhere, Ayumu, Hinagiku, and the Hakuou Three Amiga are on a tour at Cappadocia, Turkey. The next day, Ayumu and Hinagiku went to Athens in Parthenon, Greece. Meanwhile back at Mykonos, Nagi remembered that day when she met a certain boy who never kept her promise...