The script writer/mangaka insults the viewers intelligence when he thinks that whatever weird crap he writes people are going to follow and appreciate it. Really a 5 year kid obtains poison gas, antidotes, gas mask without the help of an adult,he has no problem taping the doors and window up to the ceiling and he is perfectly capable of shifting a tied and bound grown woman. Also a girl is able to somehow get a bike out of nowhere while standing in the middle of a ground. Only 7 episodes have passed and already there are no of plotholes which I am not going to delve into more as I don't want to spoil the plot(?) for anyone.
