Duet Night Abyss sells a small “set-and-forget” bundle called Lunotress’s Monthly Pass. If you’re planning to spend a little, it’s designed to convert a one‑time payment into a month of premium currency for gacha pulls — and it’s better value than buying the same currency outright.
Lunotress’s Monthly Pass: what you get
Lunotress’s Monthly Pass costs $4.99 and pays out premium currency over 30 days. The breakdown:
- Upfront grant: 300 Phoxene Plumule
- Daily grant: 90 Phoxene Plumule per day for 30 days
- Total over 30 days: 3,000 Phoxene Plumule
- Pulls equivalent: roughly 18 pulls on Myriad gacha banners
That 3,000 total is the headline — it’s the piece that makes the pass outperform one‑time currency packs of the same sticker price.
How to buy the monthly pass in-game
You purchase Lunotress’s Monthly Pass directly from the in‑game shop:
- Open the main menu and select Shop.
- Find the Monthly Pass offer and complete the purchase flow on your platform.
While you’re in the shop, you’ll also see other bundles and a seasonal battle pass under Bard’s Tome.
Value check: monthly pass vs. buying currency packs
The shop also sells Phoxene Plumule in fixed amounts. Here are the listed tiers alongside the monthly pass for context:
| Option | Price | Phoxene Plumule | Approx. pulls |
|---|---|---|---|
| Lunotress’s Monthly Pass (30 days) | $4.99 | 3,000 total (300 + 90 × 30) | ~18 |
| Currency pack | $0.99 | 60 | ~0.36 |
| Currency pack | $4.99 | 300 | ~1.8 |
| Currency pack | $14.99 | 980 | ~5.9 |
| Currency pack | $29.99 | 1,980 | ~11.9 |
| Currency pack | $49.99 | 3,280 | ~19.7 |
| Currency pack | $99.99 | 6,480 | ~38.9 |
The monthly pass delivers roughly ten times the Phoxene Plumule of the $4.99 currency pack — just spread over 30 days instead of instantly. Even against higher tiers, its cents‑per‑pull is competitive for low spenders.
What you can use it on
Phoxene Plumule funds rolls on the game’s Myriad gacha banners. The monthly pass total — about 18 pulls — is enough to sample a limited banner or save toward a larger session when rotations change. The game includes in‑game purchases and chance‑based mechanics, so expect typical variance between rolls.

How to claim pre‑registration milestone rewards (if you haven’t)
If you pre‑registered, the global milestone rewards are delivered in your in‑game mailbox:
- Open the Profile tab in the upper-left corner.
- Select the Mail screen, then claim the message titled Adventure Calls! A Team Invite from the Demon King!
The main quest “The Reborn” walks first‑time players through using mail shortly after reaching the house in Icelake, so it’s hard to miss. Milestones included currency, cosmetics, and a character reward once community goals were met.
Is the monthly pass worth it?
For players willing to log in over a month, Lunotress’s Monthly Pass is the most efficient $5 purchase in Duet Night Abyss. You trade immediacy for value: a smaller upfront grant, then steady daily currency that adds up to ~18 pulls. If you need a large stack right now, raw currency packs are faster — and the first‑time double bonus helps — but the pass remains the better long‑term conversion.
Where to install Duet Night Abyss
On PC, you can add the game to your library from its Steam listing at store.steampowered.com/app/3950020/Duet_Night_Abyss/. The game supports single‑player, online co‑op, and cross‑platform multiplayer.

If your goal is to stretch a small budget, start with the monthly pass, then layer occasional first‑time currency packs during limited banners you care about. That sequence maximizes pulls per dollar without committing to bigger bundles.