DMM GAMES has launched an SP collaboration between Fleur Days, a life-support game developed and operated by Cybrid, Inc. and Liber Entertainment Inc., and Mugenrou and Sleepless Butterfly. As part of the collaboration, an in-game exchange shop has opened where players can trade "June Collaboration Medals" for collaboration-exclusive real-world goods and other rewards. A repost campaign offering gacha tickets is also running on official X accounts.
Collaboration-Exclusive Real-World Goods Exchange Shop Now Open!
Period: June 15, 2026 (Monday) 2:00 PM – July 15, 2026 (Wednesday) 1:59 PM
An exchange shop has opened in Fleur Days where players can trade "June Collaboration Medals" for real-world goods, lottery tickets, in-game items, and more. Some items are exclusive to this exchange shop, so be sure to check it out.
For full details, see the in-game announcements for Fleur Days.
Get 10 Gacha Tickets Each! Collaboration Repost Campaign
Period: Until June 30, 2026 (Tuesday) 11:59 PM
When collaboration posts on the official X accounts of Fleur Days and Mugenrou and Sleepless Butterfly together reach a combined total of 100 reposts, all players of each respective game will receive 10 gacha tickets.
For details, check the official X accounts.
Fleur Days Official X: https://x.com/fleur_days
Mugenrou and Sleepless Butterfly Official X: https://x.com/roman_mugenro
*The collaboration period and details are subject to change without notice.
About Fleur Days
Official Site: https://www.fleurdays.jp
Collaboration Page: https://www.fleurdays.jp/collaboration/
Play the game: https://games.dmm.com/detail/fleurdays_94586723
Title: Fleur Days
Genre: Life-support game that makes every day a little better
Platform: Smartphone (browser version) / App Store / Google Play
Price: Free (with in-app purchases)
Publisher: EXNOA LLC
Developer/Operator: Cybrid, Inc. / Liber Entertainment Inc.
Cast: Akinori Egoshi / Yohei Azakami / Shogo Sakata / Takayuki Kondo
About Mugenrou and Sleepless Butterfly
Mugenrou and Sleepless Butterfly is a free-to-play (with in-app purchases) otome romance simulation game produced by DMM GAMES and Cybrid. Set in a dreamlike red-light district, players can enjoy a romance with demon characters. A parallel adult version, Mugenrou and Sleepless Butterfly -Ura-, is also available, featuring the same beloved characters in a more mature storyline and illustrations.
