A special collaboration between card-based suspense app Roppongi Sadistic Night and card battle romance game Kiss of Princess has begun as of March 25, 2026. The crossover is the first in a series of three planned collaborations marking the 10th anniversary of Roppongi Sadistic Night.
Roppongi Sadistic Night is a card-type suspense app set in Roppongi where players tackle cases alongside an all-female team. Since its launch in November 2015, the game has built a dedicated fan base through its instinct-driven storytelling, multiple endings, and more than 4,000 card illustrations. The app celebrated its 10th anniversary in November 2025.
Newly Drawn Collaboration Cards
As part of the collaboration, newly illustrated cards featuring Roppongi Sadistic Night characters dressed in Kiss of Princess character costumes are now available in-game. Revival cards from a previous Kiss of Princess collaboration are also returning, giving both new and returning players a chance to obtain them.
[Kami no Ikakudori] Oba Misato
[Saikyou no Jotei] Zeus
[Guren no Senki] Hibiki Ren
[Itan no Tankyusha] Odin
10-Roll Collaboration Special Offer
To mark the collaboration, a special 10-roll offer (gacha) is available in which the 10th pull is guaranteed SR or above. Additional bonus items are earned with each 10-roll performed during the campaign period.
Bonuses per 10-roll:
- 1st roll: Gorgeous Diamond ×1
- 2nd roll: New Collab MR 30% Ticket ×1
- 3rd roll: Misato & Zeus Exclusive MR Accessory ×1
- 4th roll: Ren & Odin Exclusive MR Accessory ×1
- 5th roll: New Collab MR 30% Ticket ×1
- 6th roll: Misato & Zeus Exclusive MR Accessory ×1, Ren & Odin Exclusive MR Accessory ×1
- 7th roll: Precious Diamond ×2
- 8th roll: New Collab MR Guaranteed Ticket ×1
- 9th roll: Choose-Your-Collab MR Guaranteed Ticket ×1
- 10th roll: Choose-Your-Collab MR Guaranteed Ticket ×2
Period: March 25 (Wed) 3:00 PM – March 31 (Tue) 2:59 PM
Collaboration Commemorative Giveaway Campaign
An SNS follow and repost campaign is running on the official X account (@ropng_night). By following the account and reposting the designated post, 10 lucky participants will receive a QUO card set featuring the collaboration artwork — a limited item available only through this campaign.
Period: March 25 (Wed) – March 31 (Tue)
Second and Third Collaborations Coming Soon
The second and third installments of the 10th anniversary collaboration series are currently in preparation. Details will be announced as they become available.
10th Anniversary Illustration Book Now on Sale
Title: "10th Anniversary Roppongi Sadistic Night Illustration Book"
To mark the milestone, a customizable illustration book is available for order. Fans can choose from approximately 600 curated illustrations drawn over the game's 10-year history to create their own personalized book.
Standard Edition
- Size: 210 mm × 297 mm
- Pages: 24 / 32 / 40 (selectable)
- Price: ¥3,520 / ¥4,521 / ¥5,549 (tax included)
Deluxe Edition (hard cover + plastic case)
- Size: 185 mm × 185 mm
- Pages: 24 / 40 (selectable)
- Price: ¥6,820 / ¥10,296 (tax included)
Desk Calendar
- Size: 148 mm × 210 mm
- Price: ¥3,080 (tax included)
Key features of the illustration book:
Choose freely from approximately 600 curated illustrations
From over 4,000 cards released in the game's history, around 600 have been selected for this lineup. Fans can build a book around a single character or combine multiple characters to create a completely personalized collection.
Cover illustration also selectable from the same lineup
The cover image can be chosen from the same pool of approximately 600 illustrations, making for a standout item whether on a shelf or displayed as décor.
Note: The desk calendar cover uses a fixed single design.
Five size and page count options
Multiple specifications are available to suit different purposes, from collector's editions to commemorative keepsakes. The deluxe edition features a hard cover and comes in a plastic case.
Order Page: https://www.stanshot.com/lp/?roppongi
Sale Period: March 6, 2026 (Fri) 3:00 PM – April 13, 2026 (Mon) 11:59 PM
Delivery expected approximately 3 weeks after order.
Roppongi Sadistic Night 10th Anniversary Collaboration Special Site: https://products.voltage.co.jp/roppongi10th-collaboration
Roppongi Sadistic Night Official Site: https://sus-app.voltage.co.jp/roppongi/
Official X (@ropng_night): https://twitter.com/ropng_night
Official YouTube Channel: https://www.youtube.com/c/ropng_night_CH
