Kuramori asks Shinichi for his help to check on his friend who, unbeknownst to them, had already been killed by a parasite named Miki. They go down the basement of a building when Migi suddenly senses another parasite coming to their location. Shinichi and Kuramori conceal themselves at first but the former cannot withstand the situation knowing that another human is about to be killed, so he exposes himself and warns the woman to escape. However, as she is running away, the parasite still manages to strike her. Enraged with what happened, Shinichi fights the enemy and he eventually annihilates him, and their whole tussle is recorded by Kuramori using his video camera. After witnessing the gruesome scene, Kuramori decides to give up investigating the parasites upon realizing that he is too weak and coward to come face to face with them.
Migi believes that Hirokawa’s group will come after them after they killed one of its members. He reminds Shinichi to avoid engaging futile resistance, but the latter seems to be completely resolute in fighting parasites to protect other people including Murano. Meanwhile, Reiko Tamura finally lets the other members of Hirokawa’s group to kill Shinichi as they all regard him as a formidable enemy. While in school, Migi senses three parasites targeting Shinichi, so the latter dashes out of the building to confront the enemies. However, while waiting and planning their strategy, Migi unfortunately dozes off, leaving Shinichi vulnerable for four hours. Just when Shinichi thinks that he has already shaken off the opponents, a man arrives and starts talking to him. Shinichi initially thinks that the guy is not the enemy, since he is expecting three parasites. But then he is shocked when the man openly implies that he is a parasite, so he immediately runs away since Migi is still asleep.
However, the man still manages to follow him, and he alarmingly calls out to Migi who fortunately wakes up just in time to confront the enemy. It turns out that the three parasites that he sensed earlier are all inside the man’s body, hence the name “Miki“. The battle between Miki and Shinichi is just about to start, but the former has already announced that “they have won” the fight, implying his upper hand in the battle.