Little Kim

 "Hey, Son! What are you doing in this building? It's a dangerous place, Son!"

 Little Ryushin turned his head when called. It turned out that the caller was a man in his 40s. The adult man who tapped Ryushin's shoulder earlier.

 Little Ryushin looked up.

 "Papa. Lyu-chin is looking fol Papa," said little Ryushin.

 Ryushin is slow to speak. In fact, at the age of Ryushin who is 5 years old now, he is still a lisp. However, Ryushin was smart from a young age.

 The old man crouched down, level with the height of the boy who was still in the kindergarten school uniform.

 "Who's your daddy, huh?" asked the old man.

 Ryushin was silent for a moment. Ryushin remembered his father's name.

 "Ultamen mebiyus, Uncle," Ryushin chirped as he started to remember something.

 "Pfftt, hahahaha ... you're so adorable, Son. I mean your papa's real name, Son."

 The man repeated the question.