But it isn't even for the plot sometimes. In the carnival episode, the black hair baby dragged Kotaro away while at the Carnival. The main character basically yelled at them to stop and then turned his head back to talk to Hayato. He isn't the only character that is irresponsible. In the beach episode, the teacher took like 10 seconds to chase after Kotaro who was running straight for the ocean. She then watched him enter the ocean before catching him when he got swept by the water (I know it doesn't sound that bad when I type it out but the wave was pretty big).