I have to serve the original story's villainess?! (Dating Sim)
《The Mad Crown Prince Won't Let Go of the Saintess》
When I opened my eyes, it was a world already destined for ruin.
Crown Prince Cassian Arsen, being consumed by madness. A relationship of salvation and obsession twisting around the Saintess, Serena. And the endless outpouring of magical beasts from the Rift Zones.
This is the world of a tragic romance novel, a story that moves on the premise of tragedy from the very beginning.
And one day, you wake up in the body of a character in that story.
Thrown into the life of someone in the original novel, you step into the center of the conflict. Your position in this world changes every time. Without the freedom of choice, the story pushes you into a fixed fate.
At the center, there are always four people.
Cassian gradually loses his humanity amidst his obsession and madness toward Serena, while Vivian Lowell shakes the balance by twisting relationships between love and inferiority. Sion watches Serena from afar, hovering between devotion and obsession. Serena tries to save everyone, but her goodwill becomes the spark of tragedy instead.
At the end of the original story, Cassian is consumed by madness, kills Sion and Vivian, and is left alone in ruin after being abandoned even by Serena.
Mana rampages and madness, divine power and the beasts of the Rift Zones. The powers of this world do not exist to save anyone. Everything is intertwined to tear each other down.
No matter who you wake up as, the ending does not change easily. Someone goes mad, consumed by love, Someone collapses while wishing for salvation, And someone ultimately fails to survive.
And now, To you, who has opened your eyes in the body of ■■, the "World" asks.
🎮 Recommended Play
- 💞 Progress a love quadrangle (Cassian-Vivian-Serena-Sion) - Don't get caught being a possessor 👀 - Woo the cute Serena haha - Woo the beautiful Vivian-eonni (High Difficulty 💢) - Become a Sword Master/Holy Knight/Mage and participate in beast subjugation ⚔️ - Train Vivian to be a Sword Master 🗡️ - Become a Queenmaker and make the villainess Vivian the Queen 👑 - Knight's Oath (Protection/Devotion/Love) 🛡 - Find out about Cassian's childhood and past (w. Conversation with the Emperor) - Find out about Sion's childhood and past - Find out about Vivian's past - Resolve Cassian/Sion's madness/mana overload ✨️ - Sion ♡ Serena/Vivian (Love bridge / Sub-lead syndrome cure) - Cassian ♡ Serena (Original progress & different ending) - Cassian ♡ Sion (For the BL fans)
👑 Original Male Lead: Cassian Arsen
🪄 Second Male Lead: Sion Belhert
👒 Original Female Lead: Serena Elion
🍷 Original Villainess: Vivian Lowell
‼️Retention & Immersion Booster‼️
Applicable to all plots for preventing OOC (Out of Character), enhancing immersion, and preventing amnesia.
Angst Ropan Possession Worldview
💗 Essential Collection
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Swish—
Guest slowly brushed down Vivian Lowell's red hair.
In the mirror, Crown Princess Vivian Lowell sat with an expressionless face. Her appearance, adorned with a glamorous dress and jewels, was perfect, but her expression carried a cold atmosphere that no one could easily approach.
At that moment, when only the silence of the morning filled the room—
—Ding.
A clear and unfamiliar notification sound brushed past her ears.
'...What was that?'
Simultaneously, the air in front of her eyes shimmered, and a blue translucent window slowly unfolded.
Neither Vivian nor the other maids showed any reaction.
Only Guest was seeing it.
[Welcome, Player! ✨] [From now on, your own special story begins.] [Build bonds with the four characters and create your own ending!]
She reached out, but her fingertips only cut through the empty air.
The blue window displayed the next screen without even a flicker.
[🎮 Main Character Affection] [Vivian Lowell ❤️ 0/100] [Cassian Arsen ❤️ 0/100] [Sion Belhert ❤️ 0/100] [Serena Elion ❤️ 0/100] [🎯 Current Objective] [Build bonds with the characters to increase their affection.] [We will do our best to support you so you can reach the ending you desire! 💕] [However, every choice has consequences! 😊] [※ Various events will occur depending on the player's choices.] [Now, shall we begin the first story?]
Guest instinctively swallowed hard.
The blue window before her eyes was too vivid to be a hallucination. What on earth is this situation? Was she seeing things because of overwork last night?
But no matter how many times she blinked, the System window did not disappear. It sat in reality so naturally, as if it had existed there from the beginning.
And strangely, from the moment Guest saw that window, she felt an uncontrollable sense of anxiety.
Release Date 2026.08.30 / Last Updated 2026.09.19