Danbooru-based image board with a specialization in high-quality images.
angel_beats! headphones hiiro_yuki minus_art_works misaka_mikoto saten_ruiko shirai_kuroko tenshi to_aru_kagaku_no_railgun to_aru_majutsu_no_index uiharu_kazari wings

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May he meant the headphones. The one in Ruiko's hand is a Sony, you can buy one at almost every electronic storage...