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Kokoro Yotsuba is a fifth-grade student who is very clumsy but very careful and caring to her belongings, learning from her grandmother about "everything has a soul". One day, she witness the birth of a strange creature from one of her colored pencils: a Cocotama named Luckytama. Surprised on each other, and with Kokoro now permanently linked to the "Contract of Secrecy", she must agree to keep their kind a secret to the world. Now living with Luckytama, she and him learn each others' friendship while meeting with other Cocotamas.
Mametchi and his friends return to study abroad at Dream Town, a place that supports the dreams of all who live there. At Dream Town, Mametchi meets the aspiring idol singer Yumemitchi, Kiraritchi and other new characters as they all follow their own dreams.