Exciting Collaboration: 'Fleur Days' Teams Up with 'Mugenrou and the Sleepless Butterfly'

Special Collaboration Event: 'Fleur Days' and 'Mugenrou and the Sleepless Butterfly'

DMM GAMES, a company based in Tokyo and led by CEO Hiroshi Tojo, is thrilled to announce the launch of an exciting special collaboration event between its popular game, 'Fleur Days,' and the enchanting title 'Mugenrou and the Sleepless Butterfly.' This collaboration is set to begin on June 1, 2026, at 14:00 and will conclude on June 30, 2026, at 13:59.

Collaboration Highlights

This event brings forth the return of the much-loved character "Kuzuha" from the previous collaboration earlier this year in February. During the event, players will have the unique opportunity to select Kuzuha as a limited-time partner, enhancing their gaming experience as they navigate through daily activities together.

Limited-Time Partner Feature

The exclusive availability for choosing Kuzuha as a partner will only last from June 1, 2026, 14:00 to June 3, 2026, 13:59. This limited-time feature encourages players to immerse themselves into the world of 'Fleur Days' alongside Kuzuha, enhancing their gameplay.

Limited Collaboration Gacha

Accompanying the collaboration is a special collaboration gacha event taking place from June 1, 2026, 14:00 to June 10, 2026, 13:59. This gacha will see the debut of Kuzuha's collaboration exclusive card, which offers players the chance to obtain a special SSR card titled "Kuzuha from Mugenrou and the Sleepless Butterfly."

Once secured, this SSR card will transform Kuzuha into an enduring partner, complete with a narrative that has been freshly written by the scenario director of 'Mugenrou.' This exciting addition will undoubtedly engage players who appreciate deeper storytelling in their gameplay.

Additionally, accumulating multiple SSR cards will unlock a variety of customization options for Kuzuha, allowing players to give their partner a new look. Here’s the lineup:

- SSR: "Kuzuha from Mugenrou and the Sleepless Butterfly"
- SR: "Dream or Reality? Kuzuha"
- SR: "Captivating Guest Kuzuha"

Furthermore, players will be rewarded with special 'June Collaboration Medals' when engaging with this gacha, which can later be exchanged for real-world goods and special event entries.

Players are encouraged to check the collaboration special page to learn more about the items and features available during this event.

Campaign to Celebrate the Collaboration

In celebration of the collaboration, a special campaign is also being held on the official X platform, where fans can post screenshots while playing 'Fleur Days' using the hashtag #MugenrouandFleurDaysCollaboratio_Kuzuha until June 9, 2026, at 23:59. Participants stand a chance to win an exclusive black tote bag.

For the most up-to-date information about the collaboration and campaign details, players should keep an eye on 'Fleur Days' announcements, available directly through the game.

About 'Mugenrou and the Sleepless Butterfly'

For those unfamiliar, 'Mugenrou and the Sleepless Butterfly' is a free-to-play romantic simulation game developed through a partnership of DMM GAMES and CYBIRD, set in a captivating dream-like brothel atmosphere where players can fall in love with various妖魔 characters, experiencing both thrilling stories and stunning visuals.

Game Overview

- Title: Fleur Days
- Genre: Life Support Game
- Platforms: Smartphone (browser version), App Store, Google Play
- Pricing: Free-to-play with in-app purchases
- Developed by: EXNOA LLC, in collaboration with CYBIRD and Liber Entertainment, two leading names in mobile game development.

For more details, check the official 'Fleur Days' website and gacha special page linked below:

Mark your calendars for this unique event filled with immersive experiences and exclusive items!