Andou Jurai is a high school sophomore with a classic example of chuunibyou, when one day he and the other four members of the Literature Club suddenly obtain super powers. Kanzaki Tomoyo, a bright, determined, closet otaku; Kushikawa Hatoko, a soothing, airheaded girl and Andou's childhood friend; Takanashi Sayumi, a mature older classmen excelling in both sports and academics; and Himegi Chifuyu, a fourth grader who's also the niece of their club's advisor, all obtain unique, powerful powers of their own, yet for some reason Andou only receives the power to produce a dark flame that has absolutely no offensive capabilities. Then, another person with super powers appears before them...
And every night when I went to bed, 
I said, "Goodnight, Dark and Dark,"
"وقبل نومي كنتُ أقول "ليلةً هنيئة يا دارك آند دارك
et avant de me coucher,
« Bonne nuit, Dark and Dark ! »
E ogni sera, quando andavo a dormire, 
dicevo "Buonanotte, Dark and Dark",