As the team prepares for the Thesis Competition, Sayaka notices a suspicious-looking girl near the test models. With the help of Erika and the others, she apprehends the girl, Chiaki Hirakawa. When Kanon interrogates her, it is revealed that her motive is personal revenge against Tatsuya - it's as if she's lashing out at him. Since she has an illegal device called a password breaker in her possession, there's no question who is behind this incident, but Tatsuya pays no need to such assumptions. Meanwhile, Erika, realizing that Chiaki is actually just a decoy, starts setting her own strategy into motion, along with Leo.