When Nagi wishes an alien on her mother's star,Nagi's wish become real Nagi helps the alien to find the spaceship. Hinagiku is relaxing on a onsen she decides to find and tell Ayumu Nishizawa the truth about that Hinagiku is fallen in love with Hayate. Then suddenly she passed out. Nagi and the alien found the spaceship and finds Hayate going to Isumi then Nagi and the alien follows Hayate. Hayate agreed to Isumi's great-grandmother he will give blood to Isumi to regain her powers but Isumi rejects the help of Hayate the great-grandmother of Isumi hits him with a morning star which cause him to bleed. Soon after Nagi and Hayate had a fight suddenly Nagi accidentally gets on the spaceship that she will never come back.
下田に到着した一行。ナギは温泉に入るが、その効能で酔っ払いのようにフラフラになり、ハヤテに救い出される。自分の裸を見ても平然としているハヤテの態度に、ナギは怒り心頭。そんな時、ナギの部屋に突っ込んでくる謎の物体。そして、その物体こと宇宙人マヤの宇宙船探しを手伝うことになったナギだったが…。
