Kaibutsu-kun is a must-watch for Arashians because it is legendary Ohno-kun' s role. He really did a great acting job and the whole cast as well. This drama has a lot to tell to everybody if watching carefully. I personally appreciated the ethical and moral implications in this drama which can help kids to be better people thanks to Kaibutsu-kun's adventures and adults to rethink their values while having fun watching. If you want to watch some light relaxing and funny fantasy, give this drama a chance.