Announcements
New Content - Ch. 7.5 Nocturnal Sweeping BokGak
Greetings, Dear Manager.
With the April 30th, 2026 (KST) Update, new content [Ch. 7.5 - Nocturnal Sweeping BokGak] will be added to the game.
▶ Event Duration
2026/4/30 12:00 (KST) ~ Before 5/28 (KST) Scheduled Update
▶ Event Rewards Exchange
2026/4/30 12:00 (KST) ~ Before 6/4 (KST) Scheduled Update
▶ Unlock Requirements
- Nocturnal Sweeping BokGak Event Banner : Clear Main Story 0-4 (Tutorial)
- Nocturnal Sweeping BokGak (Normal Difficulty) : Clear all Stages of Main Story 7.5 Nocturnal Sweeping on Normal Difficulty
- Nocturnal Sweeping BokGak (Hard Difficulty) : Clear all Stages of Main Story Chapter 8
Description
- When the event starts, the [Ch. 7.5 - Nocturnal Sweeping BokGak] Event Page will open.
- During the event period, you can earn [Sweeper Fuel Cylinder] by clearing the Nocturnal Sweeping Event Stages & the Mirror Dungeons.
- Voices will be added to the Nocturnal Sweeping story, and you can access the Nocturnal Sweeping Hard Difficulty Stages during the event period.
- You can redeem various rewards from the [Reward Exchange] by spending the event currency that you have collected.
※ The “Reflectrial][lairtcelfeR - Nocturnal Sweeping” content is set for release in the next Scheduled Update following this update. Please refer to our future notice for more information.
Event Gameplay
▶ Nocturnal Sweeping Story
Voices will be added to the story of Nocturnal Sweeping.
▶ Nocturnal Sweeping Combat Stages
You can obtain [Sweeper Fuel Cylinder] every time you complete a combat Encounter of Nocturnal Sweeping. Each Encounter has a first-time reward, and with it, you can obtain even more [Sweeper Fuel Cylinder].
However, if you had previously cleared the Nocturnal Sweeping Stages, you cannot obtain additional first-time rewards.
The final Stage of Nocturnal Sweeping is a repeatable Combat Encounter that costs Enkephalin Modules. That final Stage will have a higher Enkephalin-to-[Sweeper Fuel Cylinder] ratio, so it will be much more effective as a means of collecting [Sweeper Fuel Cylinder].
▶ Nocturnal Sweeping Combat Stages (Hard Difficulty)
Nocturnal Sweeping Hard Difficulty will become available during the Event period. Clearing Main Story Stage 8-33 will unlock the Hard Difficulty. Earn even more [Sweeper Fuel Cylinder] by playing through the Hard Difficulty.
You can earn first-time Clear rewards (including the Event currency), EX-Clear rewards, and Chapter Progression rewards by clearing the Hard Difficulty Stages as well.
Event Gameplay
▶ Mirror Dungeon
During the Event Period, [Nocturnal Sweeping BokGak Theme Pack] will have a fixed appearance on Floor 4~5 of the Mirror Dungeon Hard Difficulty. The said Theme Pack features exclusive Choice Events and E.G.O Gifts.
※ The preexisting [Nocturnal Sweeping Theme Pack] will not be changed.
※ The same Theme Pack will not appear twice in the same run once completed.
※ Nocturnal Sweeping BokGak Theme Pack will no longer have a fixed appearance once the Event ends, and may appear on different floors.
Clearing a Mirror Dungeon run will yield [Sweeper Fuel Cylinder]. Selecting the [Nocturnal Sweeping] or [Nocturnal Sweeping BokGak] Theme Packs will yield even more [Sweeper Fuel Cylinder]. The Theme Pack in the Hard Difficulty yields more Event currency than the Normal Difficulty.
※ Please note that Weekly Bonuses do not affect the amount of Event currency gained.
※ Please note that, if you have started a Mirror Dungeon run before the Event started, you will not gain Event currency from that run.
▶ Main Story
Managers who have not met the Event unlock conditions can obtain [Sweeper Fuel Cylinder] as a first-time reward from Main Story Combat Encounters. Upon your first time clearing an Encounter, you can obtain [Sweeper Fuel Cylinder] proportional to the amount of Enkephalin Spent, regardless of whether you’ve met the EX Clear Conditions or not.
※ You cannot obtain the event currency from stages that have already been completed.
※ You cannot obtain [Sweeper Fuel Cylinder] from Luxcavations or the Refraction Railway.
Event Currency
You can obtain [Sweeper Fuel Cylinder] from first-time Event/Main Story Stages completions, or by clearing the Mirror Dungeon. You also have a small chance to obtain [Sweeper Fuel Tank] in the process.
[Sweeper Fuel Tank] is immediately converted to 20 [Sweeper Fuel Cylinder] upon acquisition.
In rare cases, clearing the Nocturnal Sweeping Stages, the Mirror Dungeon, and the Main Story Stages will also yield [Sweeper Fuel Tank].
[Sweeper Fuel Tank] has the highest chance of dropping from the final Stage of the Nocturnal Sweeping BokGak Event. However, the drop chance is the same across all other Encounters.
[Sweeper Fuel Tank] is automatically converted to 20 [Sweeper Fuel Cylinder] in the Results or the Rewards screen upon acquisition.
Event Bonus Units
Obtain more [Sweeper Fuel Cylinder] by completing Event Encounters or the Mirror Dungeon while equipped with Event Bonus units.
<Event Bonus Units>
▶ 60% Bonus
- 3★ : The Middle Big Brother Heathcliff, Heishou Pack - Mao Branch Ryōshū
- E.G.O [ZAYIN] : Into the Sunset Rodion
▶ 40% Bonus
- 3★ : Heishou Pack - Mao Branch Outis
▶ 20% Bonus
- 3★ : The Middle Little Brother Sinclair, The Middle Little Sister Don Quixote, The House of Spiders: The Middle Apprentice Ishmael, Heishou Pack - Mao Branch Adept Faust, The Lord of Hongyuan Hong Lu
- 2★ : The Middle Little Brother Meursault
※ The Event Currency Bonus from each Event Identity and E.G.O is additive (rounded up).
※ Event Currency Bonus maxes out at 120% Bonus.
※ Event Bonus Units do not actually have to participate in a battle; you can earn the bonus currency simply by having them in your Team loadout.
※ Event Currency Bonus applies to first-time clear rewards and Mirror Dungeon clear rewards as well.
Event Rewards
At the [Rewards Exchange], you can spend [Sweeper Fuel Cylinder] you have collected to purchase various rewards.
Rewards include those of the existing Nocturnal Sweeping Event (Ticket Deco, Decorative Banner, 1 Event Reward Identity). 2 new Nocturnal Sweeping Event Reward Announcers will be added to the list of exchangeable items.
※ Upon reward exchange, you will obtain both New Event Reward Announcers for Nocturnal Sweeping BokGak.
※ You can no longer obtain [Sweeper Fuel Cylinder] after you obtain enough [Sweeper Fuel Cylinder] to purchase every item in the [Reward Exchange].
※ You cannot obtain duplicates of special rewards you already own (Ticket Deco, Decorative Banner, Event Reward Identity, etc.)
※ [Sweeper Fuel Cylinder] will no longer be obtainable once the Event closes after the 2026/05/28 (KST) Scheduled Update.
※ [Reward Exchange] will be open for 5 weeks, from 2026/4/30 12:00 (KST) ~ 2026/6/4 (KST) Scheduled Update.
※ Even after the event fully ends, you will be able to experience the Nocturnal Sweeping Combat Encounters or view its story anytime at Drive and Theater - [Detour Tales].