Haruhiko talks about how singing has a variety of benefits for the brain. Koito uses her singing ability to defeat a Train Phantom. She explains she has avoided people since her power appeared and usually fights Phantoms alone. She is asked to deal with a Phantom attacking school pets. Koito meets young student Kurumi Kumamakura and her teddy bear Albrecht who cares for the schools rabbit. The Phantom attacks and renders Koito unable to sing. Kurumi uses her power to transform Albrecht into a giant fighting version of himself to attack the Phantom which disappears. Koito insists on hunting the Phantom alone without help. They decide to make it a competition to see who catches the Phantom first with Haruhiko deciding to team with a reluctant Koito. Haruhiko and Koito find the Phantom first though it flees once again. Haruhiko discovers Koito blames the Phantom for ruining her life as it was the one that first caused her ability to manifest. Koito stubbornly faces the Phantom alone and is eventually saved by Haruhiko and the others who defeat the Phantom. Koito is healed by Reina. Their class teacher reveals that the Phantom was misidentified and is not the one Koito met as a child. The next day Haruhiko is still trying to repair the device from the warehouse and Koito appears outside his house to thank him for his help before storming off.