The culprit is Yasuko Aijima. Tokumi indirectly caused the death of Kenya Shibami, who was Yasuko's boyfriend and a former member of "The Knight Hearts".
The culprit is Aruto Kureishi. He is a dealer of Marijuana that Rinzaki found out. Rinzaki said to sell it to him at a low rate otherwise Aruto will get found out.
The culprit is Maika Kayaki, who avenged her brother's death by a crime group the victim and Takaki Kooriyama were part of. After the case, the same crime group intervened, but Subaru and Rumi defeated them instantly while protecting the Detective Boys. During the confrontation, Rumi was reminded of Tsutomu seventeen years ago after hearing Subaru's words.
