Help! My Uncle Is a Tentacle Monster!

I am a puppet little emperor, while my uncle is gentle and polite to outsiders, well-informed and sensible, holding great power and covering the sky with one hand. And he made fun of me as the emperor. When I found out his secret, he turned out to be a yandere, sinister tentacle monster! It just started, he ran away, he chased him and couldn't fly; he tied him up and made him live a happy life full of chrysanthemums?ˉ??ˉ?? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.