Radical Dreamers.During Golden Week, Hayate, Nagi, and Maria take a trip to Mykonos in the Aegean Sea. Hayate ask 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. Nagi's hat is blown away by the wind, and when Hayate goes to retrieve it, he falls into a time-slip and arrives 8 years back and finds a little Nagi back when she was living on the island. After he grasps what is going on, he discovers she is being targeted by the Sicilian Mafia, and he ends up protecting her from them, ultimately winning; Hayate realizes that the reason he was sent back was to save Nagi. Hayate had promised Nagi in the past to go stargazing together at the beach, but when they go at sunset Nagi's hat once again is blown away and Hayate goes through another time-slip back to the present. This caused Nagi to remember Hayate in the past as a liar who disappeared on her. Back in the present, Wataru and Saki are looking at the stars through a projector. Also, everyone else on a boat that leads to Mykonos is stargazing as well. Hayate gives Nagi back her hat and the two gazes at the starry night sky together.