Fuyu kara, Kururu. [Regular Edition]

[Machine Translation] The secret of immortal girls. The light that leaks out and the shadow of a needle. I'll be a great detective! What? What do you mean Shihon-chan might die? Eh? Shihon-chan's head is gone? It seems that Shihon-chan's headless torso was found in the meditation room. But, it is possible to reconnect the head within 48 hours, right? What? The head was not found? Did someone hide it? You don't know? Murder is not uncommon. There is always at least one murderer in a school. Killing is fine, but cutting off the head and hiding it is a taboo. If you do that, you will not be able to revive. I can't believe that Shihon-chan had such a grudge against someone that she would be killed in a way that would prevent her from being revived. If we don't somehow find the head within two days, Shihon-chan will really die! I will never accept that reality! Now is not the time to be in shock or cry! There must be something I can do! 'I've never done such a thing, but... Wow, me! I will definitely find Shihon-chan's head! I'll play detective! A boarding school isolated from the outside world. The school is a boarding school isolated from the outside world, where immortal girls live there. They spend the same amount of time as adults, growing younger and younger until they become babies, and then growing older and younger again until they become adults again. There is only one condition for graduation from the school. The only condition for graduation from the school is to be judged a genius by someone who is observing them from the outside. The moment this judgment is made, the girl is allowed to graduate and disappear from the school. The immortal girls' peaceful school life is thrown into chaos by a murder. Why are the girls immortal? Why do they grow up and become young? How much time has passed since they were trapped in the academy? How can they be decapitated and still come back to life? What happens to the girls who don't become geniuses? What is going on in the outside world? Why is there only a girl? Where are the men? What is it to die? What is life? What is life? What is life for? The key to the case is a needle. A binding needle. Stick needles. Sewing needles. Silk needles. Knitting needles. Gauze needles. Futon needles. Clothes needles. Fishing hooks. Waiting hooks. t-pins. Leather triangle needle. Led by needles, immortal girls die. ( CERO Age rating: to be determined )

不死の少女達の秘め事。漏れ出す光に針の影。──私、名探偵しますッ！「えっ？　しほんちゃんが死んじゃうかもしれないってどういうこと？　ええっ？　しほんちゃんの頭部がなくなっちゃったの？」しほんちゃんの首無しの胴体が瞑想室でみつかったらしいのだ。「でっ、でも、四十八時間以内なら首の再接続って可能だよね。　えっ？　頭が見つからないの!?　だっ、誰かが隠したの？　わかんないって？　そっ、そんな・・・」殺人は珍しい話じゃない。だって、学園に一人くらい殺人鬼はいるものだもん。人を殺すのはいいけど、頭部を切断して隠す、というのは絶対にやっちゃいけないタブーだ。そんなことされたら蘇ることができなくなってしまう。蘇生を阻止される殺し方をされるほど、しほんちゃんが誰かに恨まれていたなんて信じられないよ。どうにかして二日以内に頭部を見つけないと、しほんちゃんが本当に死んでしんじゃう！そんな現実は絶対に受け入れない！今はショックを受けたり、泣いたりしてる場合じゃない！私にはできることがあるはずだ！「そんなのやったことないけど・・・。わっ、私！」私がしほんちゃんの頭部を必ず見つける！「私、名探偵をやるよ！」外部と隔離された全寮制の学園。──そこで生活するのは不死の少女達。彼女らは大人になると同じ時間をかけて赤ん坊になるまで幼くなり、再びに大人になるまで成長し再び幼くなる、というサイクルを繰り返している。学園からの卒業条件はただ一つ。外部で観察している何者かから天才だと判断されること。その判断が下された瞬間、少女は卒業を認められて学園から姿を消すことになるのだ。不死の少女達の平穏な学園生活は、とある殺人事件によって大きく狂い始める。なぜ少女達は不死なの？　どうして成長したり幼化したりするの？学園に閉じ込められてどのくらいの時間が経過したの？どうして首を切断されても生き返ることができるの？天才になれなかった少女はどうなるの？　外の世界はどうなっているの？少女しかいない理由は？　男はどこにいるの？　死ぬって何？生きるって何？　命ってなに？なんのために、命、ってあるの？──事件の鍵となるのは針。とじ針。棒針。ミシン針。絹針。つむぎ針。がす針。ふとん針。洋服針。釣り針。待針。Tピン。革三角針。針に導かれて、不死の少女達が死んでいく。【CERO年齢別レーティング: 審査予定】