光榮特庫摩今（6）日公開，由岸田梅爾擔綱人設的「BLUE REFLECTION」跨媒體複合計畫中的新遊戲《BLUE REFLECTION: 帝》將於 2021 年 10 月 21 日發售。
「BLUE REFLECTION」跨媒體複合計畫由電視動畫《BLUE REFLECTION : 澪》（已於 4 月播出）、手機/PC遊戲《BLUE REFLECTION SUN/燦》（日本限定）、以及家用遊戲主機新作《BLUE REFLECTION: 帝》3部作品構成的複合媒體企劃。
本次為本作第一次釋出消息，故事描述夏日風景中，一位少女如同被遺落般誤入了這個世界。少女的名字是星崎愛央。
孤單漂流的學校中，生活著三位失去記憶的少女們。她們所知道的只有彼此的姓名。愛央雖感疑惑，但為了尋找回到原來世界的線索，與她們開始了奇妙的共同生活。
就在某一天，這個除了學校與一望無際水面別無他物的世界中，突然出現了一條通往全新景象的道路，愛央她們決心踏入其中。
路的那一頭是一個不可思議的地方，似曾相似之物不規則存在其中。少女們一邊疑惑，一邊正為了一探全貌前進時，那裡出現了她們從未見過的怪物。身陷險境時，少女們突然獲得了不可思議的力量。
同時官方公開了五名角色如下，包括了前代主角白井日菜子。
星崎愛央（CV.柳原 かなこ）
過著極其普通生活的少女。因為在期末考試被當，需要參加補習的她走進了暑假中的學校，不想卻誤入了陌生的世界。愛央在這個世界與心、勇希、伶那相遇，與她們協力開始尋找將世界變回原樣的方法。
靭心（CV.高柳知葉）
愛央在誤入的世界中最先遇到的少女。有自己的節奏，平常看起來總是有些在發呆，性格溫和的她，對突然到來的愛央也十分友好。心失去了記憶，不知道自己是一開始就住在這個世界還是和愛央一樣誤入了這個世界。
金城勇希（CV.芹澤優）
和心、伶那一起在學校中生活的少女。開朗活潑，是大家的開心果。在這異常的事態中依然每日尋找著有趣的事情。她也失去了自己的記憶。
宮內伶那（河瀬茉希）
和心、勇希一起在學校中生活的少女。看待事物有些悲觀，說話帶刺但是本質上是個溫柔的人，常常在遠處靜觀全貌，阻止快要暴走的隊友是她的任務。伶那也失去了記憶。
白井日菜子（CV.高田憂希）
因為某個契機現身於愛央她們面前的少女。曾經是未來備受矚目的芭蕾舞者，但是由於腳受傷無法再跳芭蕾了，她也失去了自己的記憶。
《BLUE REFLECTION: 帝》將於 10 月 21 日於PlayStation 4、Nintendo Switch 發售，Steam 發售日尚未公開，官方已經公開一般版建議售價新台幣 1,990 元、特典版建議售價新台幣 2,790 元、典藏版建議售價新台幣 4,990 元。
實體版首批封入特典為「貓耳頭箍」、早期購入特典為愛央專用服裝「盛夏比基尼」下載序號。
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