[Matrixbeast]

Kuuga 34.
So the...Porcupine(?) Grongi is running around haunting high school boys, inserting some kind of needle into their brains that kills them in 4 days. Pretty rough. Even worse, he's been seen at many of their funerals, further haunting those that have already been hit.

The police is in a scramble to catch him as he's everywhere and all the deaths occur 4 days after the encounter. They catch a breath of fresh air as he tries to haunt a kid who fled to a cabin in the woods to escape him, giving them the perfect idea of where he's going. Godai catches him before he can do the deed and a fight ensues.

In the meanwhile, during a meeting with the Grongi, we see a kabuto beetle Grongi that seems to have some matter of authority as two other, arguing Grongi, backed down when he spoke up.

This was probably the first episode in the series to have a sense of "Supernatural thriller" to it, featuring a monster that stalks his prey and kills them 4 days after, all while haunting them and others around them. It gives a large impact to death, featuring the deceased family and friends mourning, and it just has a greater atmosphere. Much better than a monster just flying around killing at random.