Nadeshiko returns, but much to Kukai's surprise, he is actually a boy named Nagihiko. When Amu sees him, she is told that Nagihiko would be the new Jack's Chair. Amu still believes Nagihiko is Nadeshiko's twin even though they are the same. Rima is jealous and suspicious of Nagihiko, especially with his and Amu's friendship. Later, Amu is seeing hanging around Mamoru Mizuno who wishes to visit the town's planetarium. Lulu notices this, so she plans to get to Mamoru after he leaves the planetarium, but Amu sees her. Lulu brushes her off, angering Amu immensely. Mamoru later goes to the Guardians with his Heart's Egg turned into a ? Egg, and he Character Transforms to Space Dream. Amu Character Transforms to Amulet Heart. Thanks to the Humpty Lock; Tadase's, Rima's, Yaya's, and Kukai's transformations power-up. Using his powers, he lifts a lot of things off the ground. He tries to lift a rocket-style play set, but the Guardians hold it down. Amu acquires roller skates, Heart Speeder, to chase after him. Eventually, Mamoru realizes he is in the wrong, changing his ? Egg into an X Egg, which Amu purifies.
あむは、ロイヤルガーデンに迷い込んだ水野君をプラネタリウムに案内。水野君から宇宙飛行士になりたいという話を聞く。2人は歩いているうちに迷ってしまうが、プラネタリウムの管理人である理事長が現れ...。
