Ashibe-kun wanted to gather chestnuts, so his grandpa bought a mountain for him! Goma-chan has never had chestnuts before, so he's excited, too! Now, let's all go pick up chestnuts together! The gang searches the ground in a grove of chestnut trees, but... what? There are no chestnuts anywhere. Then they find some mysterious footprints... Could the one who ate all the chestnuts be the unidentified creature Cheskenstein?!
Any unfamiliar creature that can't be 
clearly identified is called a UMA.
أي مخلوق غير مألوف وغير مُعرَّف يُشار
إليه بمُصطلح يوما
Jedes Wesen, das nicht eindeutig identifiziert
werden kann, nennt man UMA.
Son las siglas en inglés 
de animales misteriosos sin identificar.
Son las siglas en inglés de animales
misteriosos sin identificar.
Personne ne sait
s’il existe vraiment.
Tutte le creature ignote che non possono
essere identificate chiaramente vengono chiamate UMA.
Qualquer criatura estranha que não podem ser
claramente identificadas são chamadas de UMA.
Всех загадочных зверей 
принято называть УМА.