Hello, this is Project Moon.

We have identified an issue where a certain buff effect in Refraction Railway Line 5 began to work differently from its description after Mar. 12th (Thu) 12:00 (KST) Scheduled Update.

To address this issue, we will be temporarily closing Refraction Railway Line 5(RR5 henceforth), reverting certain clear records, and taking appropriate future measures.
Please continue reading for more information.

We sincerely apologize for the Inconvenience.

[ Issue ]- An issue where the RR5 buff effect "The Lone Gunman" applies to all Identities
※ Relevant Effect : Raise Min & Max Speed values for the #1 Deployed Identity by 1. The said unit loses a Skill 1, but gains a Skill 3

[ Cause ]- This issue is a side effect of addressing an issue where, when certain buffs that increase or reduce per-rank Skill reserve are applied, certain Identities' unique Skills could be shown to have more than 0 copies

※ We have identified an issue regarding buff effects that change the per-rank Skill reserve.
This issue affects 4 following effects: "Training Team Captain", "Ready to Fire", "Welfare Team Captain" and "The Lone Gunman".

These buffs all have an effect that increases or decreases the number of copies for each Skill rank. Initially, the Skill reserve changing effects were applied based on the "order" of Skills owned by each Identity, not by the "rank" of each Skill.

This caused certain Skills that become available only upon meeting certain conditions, which are supposed to show "0 copies" in the UI, to show more than 0 copies while this effect is active.

With the Mar. 12th, 2026 Scheduled Update, we have deployed the fix so that the Skill reserve changing buff effect would apply based on the "rank" of each Skill, instead of the "order" of Skills owned by each Identity.

However, in the process of addressing this issue, the following issues were also identified.


1. Omission from "Bug Fixes & Improvements" List : We failed to notify our Managers through the update notice about how this issue is to be fixed.
: The cause of this omission was that, due to a misstep, the list containing this particular update specification was not included in the announcement specification. As a result, the QA process was not properly undertaken for this change.

We sincerely apologize for the confusion this has caused to our Managers.


2. Error in the Application Scope of the "The Lone Gunman" Buff : An error occurred in the effect application scope of "The Lone Gunman" buff while fixing the issue.

< Before the Mar. 12th, 2026 Update >
- Effect applied only to the #1 Deployed Identity

< After the Mar. 12th, 2026 update >
- Effect applied to all allies

: Although cross-verification was carried out between our developers during the process of fixing the "The Lone Gunman" buff effect, we failed to identify that the Deployment order-checking logic, which was previously applied, was omitted. We mistakenly determined that the fix was functioning correctly, which led to this issue.

: This issue will be addressed so that the buff functions as it did prior to the Mar. 12th Update.



[Future Measures]
To prevent similar issues, we will strengthen the following 3 procedures:

1. When modifying preexisting specifications already released in the live version of the game, we will ensure that changes are shared with the person-in-charge of each team and keep the changes recorded in the update log.

2. We will perform cross-checks to ensure update logs are properly recorded.

3. When modifying existing code, we will use tools that allow comparison with the unchanged version to further verify any changes applied.



[Refraction Railway Line 5 Temp. Closure]- When : After 2026.03.16 21:40(KST)
- Re-opening : After 2026.03.19 Scheduled Update


[ Refraction Railway Line 5 Clear Records to be Rolled Back ]
- When : With 2026.03.19 Scheduled Update
- Rollback Users : Users who have cleared Refraction Railway Line 5 after selecting "The Lone Gunman" buff after the 2026.03.12 Scheduled Update.

※ We are currently investigating the clear records to verify the scope of affected users.
※ Even if it takes time, we promise an accurate investigation, and will share a detailed rollback plan with a future notice.

Once again, we apologize for the inconvenience.
We will take greater care so that no same issue occurs again.



[Refraction Railway Line 5 Error Compensation]
Content: Lunacy x500
Recipients : All users whose game accounts were created before 10:00 Mar. 26th, 2026 (KST)
When : After Mar. 16th, 2026 (Thu) 22:00 (KST)
Can be claimed once per account

Error Compensation can be claimed until Mar. 26th (Thu) 2026, 10:00 (KST) via the in-game Mailbox. (Mail available for 7 days)