《那天的野獸》（その日の獣には、）是由IDEA FACTORY旗下乙女遊戲品牌Otomate於2025年推出的一款黑暗奇幻戀愛冒險作品，登陸Nintendo Switch平台。作為近年少數主打「野性與救贖」題材的乙女遊戲，一公開便在玩家社群中掀起高度討論，特別是在劇情風格與角色塑造方面呈現出相當鮮明且具有爭議性的特色。繁體中文版預計由Game Source Entertainment代理，於2026年上半年推出。

故事背景設定於名為「帕列斯特」的世界，在這裡，人類與被稱為「獸」的異類共存，但彼此之間充滿恐懼與排斥。主角是一名自幼被隔離於神殿中的少女，被視為能夠抑制「獸性」的祭司象徵。然而，一場突如其來的動亂打破了原有秩序，她與數名被囚禁、甚至被視為極端危險的「野獸男子」產生了命運交錯的連結。隨著劇情推進，玩家將在「理性與本能」、「恐懼與依附」之間反覆掙扎，見證角色如何在壓抑與情感之中逐步崩解或重生。作品並不避諱描寫人性陰暗面，反而透過強烈的情緒張力，去探討「人與獸」之間界線的模糊與扭曲。

在遊戲系統上，延續傳統視覺小說的架構，但透過多層次機制加強沉浸感。玩家的選擇不僅影響角色的好感度，還會改變「信任」與「瘋狂」數值，進而導向截然不同的劇情發展與結局。當劇情進入關鍵場面時，系統會觸發類似本能視角的演出，迫使玩家在壓抑或釋放角色野性之間做出判斷，這種設計讓遊戲不只是單純的戀愛選擇，更帶有心理層面的壓迫感與參與感。此外，遊戲提供即時顯示好感變動的功能，以及可自由跳轉章節的流程圖系統，大幅提升多周目遊玩的便利性。

視覺表現方面，由角色設計師結城曉操刀的人設，被普遍認為是本作最具吸引力的元素之一。其畫風兼具野性張力與細膩美感，特別是在CG構圖與氛圍營造上，成功塑造出一種既危險又迷人的視覺體驗。聲優的演出同樣表現亮眼，無論是情緒崩潰還是逐漸獸化的過程，都呈現出層次分明的聲音表演，進一步強化了劇情的沉浸感。

從市場評價來看，在2025年至2026年間呈現出明顯的兩極反應。一方面，玩家高度肯定其獨特的美術風格與劇本深度，尤其是在描寫角色心理創傷與依存關係方面，展現出相當成熟的敘事能力，甚至常被拿來與終遠的維爾修相比，視為同類型中偏向「絕望系」的代表作。然而另一方面，作品中偏重的暴力描寫與壓抑氛圍，也讓部分玩家感到不適，特別是期待輕鬆戀愛體驗的族群，往往難以接受其沉重基調。此外，部分結局條件設計較為隱晦，使得玩家在未查閱攻略的情況下，較難順利達成理想結局。

整體而言，《那天的野獸》是一部在乙女遊戲市場中相當罕見且大膽的作品。它不僅挑戰傳統戀愛遊戲的敘事框架，也將「異類依存」與「危險情感」推向更極端的表現層次。如果玩家偏好帶有黑暗氣息、心理張力強烈，並且不迴避人性陰影的故事體驗，那麼這款作品無疑是截至2026年最值得關注與體驗的暗黑系乙女遊戲之一。

“The Beast of That Day” (その日の獣には、) is a dark fantasy romance visual novel developed by IDEA FACTORY under its otome brand Otomate, released in 2025 for Nintendo Switch. The Traditional Chinese version is planned for publication in 2026 by Game Source Entertainment.

The story is set in a world called “Parest,” where humans coexist with beings known as “Beasts,” though the relationship between the two is defined by fear and hostility. The protagonist is a young woman raised within a secluded temple, regarded as a priestess capable of suppressing “beast instincts.” However, after a sudden uprising, she becomes entangled with several imprisoned “beast men” who are considered extremely dangerous. From this point onward, the narrative centers on her struggle between reason and instinct, trust and rejection, as well as love and survival in a deeply unstable world.

Rather than focusing on a conventional romantic tone, the game emphasizes psychological tension and emotional dependency. Player choices influence multiple hidden parameters, including “trust” and “madness,” which significantly alter character behavior and determine branching storylines and endings. Certain key scenes introduce an “instinct trigger” presentation, where perspectives shift to reflect animalistic impulses, forcing players to decide whether to suppress or embrace those instincts. This mechanic reinforces the game’s central theme of blurred boundaries between humanity and beastliness.

The visual presentation is one of the game’s strongest aspects. Character design by illustrator 結城曉 is widely praised for combining elegance with raw, feral energy, creating a distinct aesthetic that blends beauty and danger. Voice acting is also highly regarded, especially during emotionally intense or “beast transformation” scenes, where performances convey layered psychological breakdowns.

In terms of reception, the game has received mixed but passionate responses between 2025 and 2026. Many players praise its strong artistic direction, atmospheric CGs, and deep psychological writing, often comparing it to darker otome titles such as End of the World with You. However, its heavy themes—such as violence, psychological distress, and dependency—make it unsuitable for players seeking lighthearted romance experiences. Some also criticize the unclear requirements for certain endings, which can make full completion difficult without guides.

Overall, The Beast of That Day stands out as a rare and bold entry in the otome genre. It explores unsettling emotional bonds and the thin line between humanity and instinct, making it one of the most notable dark-themed otome titles of its era for players who prefer psychologically intense and morally complex narratives.