Rio is not a spoiled kid. He is just a kid. On the other hand, Keichii is a grown up man acting immaturely in front of a kid.
He is a kid but you can tell a kid being spoiled.
Well, adults around him certainly do spoil him, but I don’t think he’s acting spoiled. He did not even throw a tantrum even though he was obviously jealous of the kiss, he just cried silently.
Rio is not a spoiled kid. He is just a kid. On the other hand, Keichii is a grown up man acting immaturely in front of a kid.