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Steam News23 January 20265mo ago

Third Character Update

Hello, Yongcheon High students. Finally, the third student, Chemistry Club President 'Arin', has been updated! Introducing Arin, the student with the most unique and dangerous charm among those trapped in the school.

Full notes

Full Midnight Study update

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What changed

0 fixes1 addition2 changes0 removals
  • Gameplay
changedFinally, the third student, Chemistry Club President 'Arin' , has been updated!
added🧪 Character Intro: The Curious ToxicologistArin experimented with various poisons and chemical reactions over and over again. That dangerous curiosity eventually led to the creation of new potions and inventions just for her.
changed⚗️ Combat Style: Strategic Throwing & Chain ExplosionsWe always welcome your feedback, bug reports, or strategy sharing regarding Arin's gameplay! Please use the Discussions and Discord for feedback!

Hello, Yongcheon High students.

Finally, the third student, Chemistry Club President 'Arin', has been updated!

Introducing Arin, the student with the most unique and dangerous charm among those trapped in the school.

🔓 Unlock Condition (Must Read!)

'Arin'is unlocked only after clearing the game (reaching the ending) at least once with 'Sumi'.

If you haven't escaped the school with Sumi yet, hurry up!

(Note: Even if you cleared the game with Sumi before the update, you must clear it again to unlock Arin.)

🧪 Character Intro: The Curious Toxicologist

"Every phenomenon has a logical explanation~

It’s just an area science hasn’t uncovered yet !!"

Arin is just as eccentric as Haneul and Sumi.

She is a Gold Medalist who swept every chemistry competition inside and outside the school, and also a whimsical researcher trying to analyze the school's ghost stories with scientific curiosity.

She usually looks like a bright, cheerful, and clumsy student who often breaks beakers, but...

What she was secretly obsessed with in the corner of the lab were extremely dangerous substances.

They were deadly'Venom'and'Acid Solutions'.

Arin experimented with various poisons and chemical reactions over and over again. That dangerous curiosity eventually led to the creation of new potions and inventions just for her.

And now that the long Midnight Study has begun, It is finally time to use those potions.

⚗️ Combat Style: Strategic Throwing & Chain Explosions

Arin deals with Charms in a completely different way than previous characters.

  1. Throwing 3 Types of Potions

Arin can choose and throw one of three types of potions depending on the situation.

Each potion has a unique explosion pattern.

  • Cross (➕): Releases refined deadly poison.

  • Three-pronged (Ψ): Sprays acid solution forward.

  • Circle (●): Poison gas explosion.

  1. Unique Artifact: 'Potion Belt' & Chain Explosion

Arin's biggest feature is the'Chain Reaction'.

With Arin's Unique Artifact'Potion Belt', a'Support Potion'is spawned in the mist every turn. When this Support Potion is hit by a thrown potion of the same type, it triggers a powerful Chain Explosion.

Identify the location of the Support Potions and throw the right potion to engineer a chain explosion that covers the entire school!

What will the Midnight Study look like with the third student, Arin? We hope Arin's dangerous experiments will lead to an exit.

We always welcome your feedback, bug reports, or strategy sharing regarding Arin's gameplay! Please use the Discussions and Discord for feedback!

Then, we hope you have an enjoyable Midnight Study today with Arin's potions!

Source

Steam News / 23 January 2026

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