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Midnight StudyNewsThird Character Update
Major update

Third Character Update

Midnight Study · published 23 Jan 2026, 07:14 UTC

All newsPlayers around this dateRead on Steam

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.

2. 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!

More from Midnight Study

Other announcements

All news
In-game event3 Apr 2026[26.04.03 Release Notes] 0.6.2📢 Patch Notes Hello, this is the Midnight Study development team. In this update, new boss relics that enhance students’ projectiles and unique relics have been added. Defeat the bosses of each ACT and experience even greater growth and satisfaction! Along with this, various quality-of-life improvements and bug fixes have been implemented. 🔮 Relics · New boss-exclusive relics for each student…Major update27 Mar 2026v0.6.0 Update & New Charms RevampHello, students of Yongcheon Girls' High School. In this v0.6.0 update, along with various improvements including balancing, a large number of new talismans have been added, resulting in a complete revamp. Check out the newly added character-specific talismans and additions right now! 🎴 1. Character-Specific Charms Added Moving away from the existing shared charm system, character-specific cha…Community25 Mar 2026Slot Data Reset ScheduleHello, this is the Midnight Study Development Team. As previously announced, a slot data reset will be conducted according to the schedule below. This reset is a mandatory process for the complete overhaul of the Charm system and the v0.6.0 update. Please be advised that all existing slot data will be deleted after the update to ensure a smooth transition to the new system. 📅 Reset & Patch Sch…