July 10, 2026, Tokyo, JAPAN – COVER Corporation is pleased to announce a collaboration with the popular mahjong game Celebrity Mahjong (明星3缺1) launching a limited-time crossover collaboration with hololive production starting on July 15, 2026. This collaboration brings together three popular hololive production talents Houshou Marine, Hakui Koyori and Juufuutei Raden, and will involve various activities including the sale of exclusive collaboration outfit sets, an affection-point cheering event, a shining card-album collection, and a limited-edition collaboration merchandise lucky draw at Comic Exhibition, the largest annual ACG-related convention in Taiwan.

For exciting updates and the latest news regarding this collaboration, be sure to visit Celebrity Mahjong’s official social media accounts.

Official Celebrity Mahjong Facebook Page: https://www.facebook.com/Gametower371

Collaboration Details and Events

Play a game of mahjong with your favorite talents! A highlight of this collaboration is that Houshou Marine, Hakui Koyori and Juufuutei Raden will sit down at the Celebrity Mahjong table to play mahjong alongside the player! A dedicated in-game event page will open, offering each member’s own outfit set and exclusive items, spanning a variety of content from mahjong items to amusement-park themes, gorgeously designed and meticulously detailed to fully capture each VTuber’s charm. During the event period, purchasing any hololive production collaboration limited-edition star, mahjong item or other bundle earns fans a lucky-draw ticket for limited-edition merchandise.

For more information, please see the following Event Sales Page: https://www.gametower.com.tw/Action/11_Star31/20260703MU/index.aspx

■ Affection-Point Cheering Event

During the event, players can earn exclusive cheering items by playing the game and completing quests, then “dedicate” them in support of their favorite idol. The more cheering items dedicated, the higher that idol’s cheer-point ranking climbs — players not only earn more generous in-game rewards, but also stand a chance to win the collaboration limited-edition merchandise of Houshou Marine, Hakui Koyori and Juufuutei Raden. Push your idol to the very top of the rankings!

■ Shining Card Albums, Limited Collection: Complete Them for the Ultimate Prize of 12 Million i-Coins

The collaboration limited-edition digital card albums of the three hololive production talents will launch simultaneously. Completing a single album earns you a permanent “exclusive limited title”; and anyone who collects all 12 albums wins the ultimate grand prize of 12 million i-Coins deposited straight into their account. These card albums are available for a limited time only; once the collaboration ends, the cards can no longer be obtained through trading, so collectors should not miss out.

■ Celebrity Mahjong Booth at Comic Exhibition — Limited Collaboration Merch Awaits

Beyond the exciting in-game activities, Celebrity Mahjong will also be present at Comic Exhibition, to take place from July 23 to July 26 at TWTC Exhibition Hall 1. Those who visit the “Celebrity Mahjong” booth and take part in the activities will have a chance to win hololive production collaboration limited-edition merchandise. Prizes include a collaboration large body pillow, as well as acrylic blocks, charms, coasters, badges and many other finely crafted goods. All players and hololive fans are warmly invited to visit the booth and experience the full charm of this collaboration up close.