Takopii, a squid-like alien from "HAPPY Star," comes to Earth to spread happiness and meets Shizuka Kuze, a fourth-grader. Unaware of Shizuka's struggles—her parents' divorce, bullying, and her missing dog Chappy—Takopii tries to help with "HAPPY gadgets." Misunderstanding her pain, he gives her a ribbon meant to mend friendships, but Shizuka uses it to hang herself. Confused, Takopii uses a "HAPPY camera" to rewind time, determined to save Shizuka and bring her happiness.
