There were rumors of a strange site saying, "Erase the memory of past mistakes and rewrite it with a memory that suits you." Meanwhile, Keita is invited by her classmate to the house of a dubious old man. Keita was wary at first, but he was completely addicted to the military shogi recommended by the old man. After that, Keita came to go to the old man's house ...
「過去の失敗の記憶を消して、自分に都合のいい記憶に書き換えられる」とうたう妙なサイトの噂が広がっていた。そんな中、ケイタは同級生に誘われて怪しげな老人の家に招かれる。最初は警戒していたケイタだが、老人の勧める軍人将棋にすっかりハマってしまう。その後、老人の家に通いつめるまでになったケイタだが…。
