《少女偵探：永生之謎》是以劇情推理解謎為核心的視覺小說冒險遊戲，由Steam 於2024年11月8日推出，Nintendo Switch版本則預定於2025年12月11日上市。以歐洲大陸的大戰後時代為背景，透過細膩的角色刻畫、沉浸式的敘事步調與濃厚的神秘氛圍，展開一段牽動陰影與光明、謊言與真相的冒險旅程。

故事發生在十多年前的大戰落幕後，滿目瘡痍的歐洲正努力重建。科技革命帶來時代的飛躍，但戰後的餘燼尚未熄滅，各國仍徘徊在動盪與不平之間。在亞平寧半島的中心，古老的佛羅倫薩依舊佇立於歷史縫隙之中，狹窄的街巷、斑駁的建築，以及看不見的暗流，共同構成一座充滿秘密的霧都。

女主角梅曲（Meiku Sonia）原是迷霧城出身的煉金術化學研究員，天賦過人，記憶力驚人，卻性格內斂孤傲。幼年留學期間，她得知家中突發劇變，而事件陰影至今仍如鬼魅般纏繞心頭。抱著揭開真相的執念，她賣掉家產、離開故鄉，最終在佛羅倫薩成立偵探事務所，靜靜在城市角落收集線索，等待某個關鍵時機的到來。

這個時機，正是斯內爾·奧羅拉（Snell Aurora）的出現。她來自冰雪之國，擁有雪白長髮與若似女巫般的冷豔氣質。天生聰慧卻因外貌被誤解為「白髮魔女」，在求學時遭孤立，但她柔和又俐落的談吐掩藏著罕見的洞察力。梅曲與斯內爾在某起離奇案件現場不期而遇，兩人因緣際會連結在一起，也因此觸發關於「永生」的神秘傳說。

伴隨著調查深入，城市的霧氣逐漸被揭開，跨越百年的陰謀浮現出輪廓；神秘組織的影子、被隱藏的歷史、以及名為「永生」的詛咒般信念，悄悄編織成一張盤根錯節的巨大網絡。在生與死、真理與謊言之間，梅曲與斯內爾的關係亦在微妙地變化，既是盟友，又可能是彼此命運的引爆點。「你……是我的盟友，還是敵人？」成了貫穿劇情的關鍵疑問。

在內容呈現上，以高品質的故事配音、二十餘幅精美插畫、可愛的SD風格插畫，以及完整的CG與OST鑑賞系統，構成一場極具美學氣質的推理冒險。Switch 版本更加入「故事模式」，以更舒適的節奏吸收劇情，對喜愛文字冒險作品的玩家相當友善。

操作上，以經典視覺小說介面為基礎，透過閱讀、選擇分支、掌握線索與人物互動來推動劇情。儘管流程以敘事為主，但其中的心理暗戰、對話選擇與世界觀探索，使遊玩過程既沉浸又引人深思。能自由回顧CG與音樂，並透過人物資料深入理解每位角色的背景與心境，使其更具情感連結。

角色陣容亦是本作備受推崇的亮點。梅曲沉著冷靜、過目不忘；斯內爾溫和內斂、口齒犀利帶點神秘；西爾維亞則以柔弱外表與驚人美貌被稱為「佛羅倫斯玫瑰」，內心卻極為堅定；至於蘿拉，舉止高雅、氣質迷人，但總是帶著令人難以捉摸的距離感。每位角色都擁有鮮明特質，而她們之間的互動，正是本作魅力所在。

在市場評價層面，自Steam發售以來，以精緻美術、細膩敘事、角色魅力與充滿歐洲風情的偵探氛圍獲得玩家廣泛好評。許多評論提到，它成功將懸疑推理與奇幻要素融合，呈現出近年少見的文學式視覺小說體驗。而富含情緒張力的角色配音、娓娓道來的敘事節奏與成熟的世界觀構成，使其在擁擠的VN市場中展現獨特風格。

總而言之，《少女偵探：永生之謎》是以劇情深度、角色魅力與神秘氛圍著稱的故事型遊戲。以戰後歐洲風情與超自然陰影交錯的舞台，引領玩家走入一則跨越世紀、關於永生與真相的推理旅程。對熱愛懸疑、美術風格、角色劇情的玩家而言，本作不僅是冒險，更是一段值得反覆回味的黑暗童話。

“Girl Detective: The Mystery of Immortality” is a story-driven visual novel adventure centered on deduction and mystery-solving. The game launched on Steam on November 8, 2024, with the Nintendo Switch version scheduled for release on December 11, 2025. Set against a post-war European continent, it weaves a journey through shadow and light, lies and truth, using delicate character writing, immersive narrative pacing, and a rich, mysterious atmosphere to draw players into its world.

The story unfolds more than ten years after a devastating war left Europe in ruins. Though technological revolution propels society forward, the lingering ashes of conflict have not fully settled. Many nations remain trapped in unrest. In the heart of the Apennine Peninsula stands ancient Florence—its narrow alleys, weathered buildings, and unseen undercurrents forming a mist-shrouded city full of secrets.

The protagonist, Meiku Sonia, is an alchemical chemistry researcher from the fog-covered Mist City. Gifted with extraordinary memory and a sharp mind, she is introverted and reserved by nature. During her early years studying abroad, she received news of a sudden and mysterious tragedy that struck her family—an unresolved incident whose shadow continues to haunt her. Driven by a deep obsession to uncover the truth, she sold off her family estate, left her homeland, and eventually established a small detective agency in Florence, quietly gathering information from the city’s darkest corners while waiting for the moment when the truth might reveal itself.

That moment arrives with the appearance of Snell Aurora. Hailing from a snowy northern country, Snell possesses long white hair and a witch-like, ethereal beauty. Her intelligence is exceptional, yet her striking appearance once caused her to be ostracized during her studies abroad, giving rise to the rumor of the “white-haired witch.” Calm, soft-spoken, but razor-sharp beneath her gentle exterior, Snell crosses paths with Meiku at the scene of a bizarre crime. Their encounter binds their fates and triggers the awakening of a long-forgotten legend—one that speaks of “immortality.”

As the investigation deepens, the mist enveloping Florence begins to lift. A conspiracy spanning a century slowly takes form: a shadowy organization operating behind the scenes, a buried history the city wishes to forget, and an almost curse-like belief in eternal life. All of it weaves into a vast, intricate web. Caught between life and death, truth and deception, Meiku and Snell’s relationship grows increasingly complex—sometimes allies, sometimes potential adversaries. The question, “Are you my ally… or my enemy?” becomes a defining thread throughout the narrative.

In terms of presentation, the game offers high-quality voice acting, over twenty beautifully illustrated CGs, charming SD artwork, and full galleries for CG and soundtrack appreciation. The Switch release further includes a “Story Mode,” allowing players to enjoy the narrative at a gentler, more comfortable pace—an especially welcome feature for fans of text-based narrative games.

Gameplay follows a traditional visual novel format, where reading, selecting dialogue branches, gathering clues, and interacting with characters guide the progression. While narrative remains the core, the game incorporates subtle psychological battles, meaningful choices, and rich worldbuilding that keep the experience immersive and intellectually engaging. Players can freely revisit unlocked CGs and music, and character profiles add depth by revealing each character’s history and emotional struggles.

The cast is one of the game’s greatest strengths. Meiku is calm, precise, and blessed with photographic memory. Snell is composed and gentle but sharp-tongued and enigmatic. Sylvia, known as the “Rose of Florence,” captivates others with fragile beauty and striking blue eyes yet possesses an unexpectedly strong will. Laura, elegant and graceful, radiates charm but maintains an elusive air that keeps others at a distance. Each character is vividly portrayed, and their interactions form the emotional backbone of the story.

Following its release on Steam, the game received warm praise from players for its refined art, thoughtful storytelling, compelling characters, and European detective atmosphere. Many noted its successful blend of mystery and subtle fantasy elements, creating a literary style rarely seen in modern visual novels. Its expressive voice acting, deliberate pacing, and well-developed world help it stand out in a crowded VN market.

In summary, “Girl Detective: The Mystery of Immortality” is a narrative-driven adventure renowned for its story depth, character appeal, and atmospheric mystery. With its post-war European setting interlaced with supernatural shadows, the game guides players through a centuries-spanning investigation into the nature of immortality and truth itself. For fans of suspense, elegant art direction, and character-driven narratives, this title offers not just an adventure but a dark, beautifully woven tale worth revisiting again and again.