Stitch, Yuna und Tigerlily sind zusammen in die Großstadt auf die Hauptinsel gezogen. Yunas erster Schultag ist ziemlich schwer und Stitchs Kapriolen machen ihn nicht einfacher. Währenddessen schicken van Hamsterdam und Delia ein paar fiese Experimente auf die Erde, um Stitch zu attackieren, den Unterricht zu stören und Yuna zu blamieren. Yuna beschuldigt daraufhin Stitch. Als Stitch von Hamsterdam entführt wird, setzt Yuna alles daran, ihn mit Jamba und Pliiklii zu retten.
Stitch and Yuna move to Newtown because Obaa can no longer support Yuna as she is growing old and Stitch must find and purify any remaining altered experiments. While they are there they meet Reika, her friends, and Takumi. Later Stitch wants to return Yuna's handkerchief but ends up almost destroying the school which upsets Yuna. Hamsterviel puts in two coins in a large gum ball dispenser and gets two large experiment pods out and then runs in front of a screen that reveals Delia which is Hamsterviel's new partner. Delia calls Hamsterviel Hamu Sama which causes hamsterviel to say that his name is hamsterviel not Hamu Sama, which causes Delia to get annoyed and screams "there all the same to me!" Stitch later begins to leave and gets attacked by Plasmoid and Splodyhead and again destroys the school which then makes Yuna think Stitch has broken his promise and lied to her. Stitch stays away from Yuna to try catch the two altered experiments but gets captured by Gantu.
