Chance Encounter... with Wicked Lord Shingan.After discarding his past grandiose delusions during junior high school, Yūta Togashi witnesses a girl named Rikka Takanashi climbing down the balcony of his apartment. Yūta travels by train to his first day of high school and quickly befriends classmate Makoto Isshiki, who is always scouting for the girls in class. Yūta is then approached by Rikka, who exhibiting her own signs of chūnibyō syndrome, resulting in him escorting her to the school infirmary. He realizes that she previously eavesdropped on him getting his delusions out of his system. Despite Yūta having no interest in reliving his delusions, Rikka claims him as her soulmate. After the opening ceremony, Yūta is invited by Makoto to grab a bite to eat, but instead he is asked by homeroom teacher Nanase Tsukumo to walk Rikka home, since she moved in two days ago with her older sister Tōka Takanashi above Yūta's apartment. After taking the train home, Yūta's younger sister Kuzuha Togashi tells Yūta that a bunch of stuff belonging to Rikka were delivered to their apartment. After Yūta helps Rikka move the boxes into her apartment, Rikka asks Yūta to keep his memorabilia that he discarded.