{"rewrite":{"id":"r_b9af975f11fc77e703aa2cc7","clusterId":"c_54688bef7ad8a67eee8f3170","slug":"project-sekai-launches-collaboration-with-deemo-and-cytus-series","model":"deepseek-v4-flash","headline":"Project Sekai Launches Collaboration With Deemo and Cytus Series","summary":"Project Sekai: Colorful Stage! feat. Hatsune Miku began a collaboration with the Deemo and Cytus series on June 21, 2026. The event includes a login campaign, a premium gacha, a stamp mission, and the addition of the song \"SAIRAI\" by Shinichi Kobayashi. The collaboration runs through July 3.","whyItMatters":"The collaboration brings two major rhythm game franchises into Project Sekai, offering limited items and a new song that expands the game's music library.","webCardHtml":"\u003cp\u003eThe collaboration launched on June 21 with a login campaign that rewards players with MySekai furniture \u0026#34;Mirai Statue,\u0026#34; a \u0026#34;Piano Fudge Cake,\u0026#34; and a \u0026#34;Blue Flower Drink\u0026#34; for logging in by June 28. A premium present gacha guarantees at least one ★4 member and includes limited costumes \u0026#34;Alice Good Night\u0026#34; and \u0026#34;felzione\u0026#34; along with a custom profile sticker. A stamp mission offers a limited title for completing all tasks. The song \u0026#34;SAIRAI\u0026#34; by Shinichi Kobayashi has been added to the rhythm game and can be obtained with Music Cards from the Music Shop.\u003c/p\u003e","blueskyPost":"Project Sekai's collaboration with Deemo and Cytus adds only one new song, 'SAIRAI' by Shinichi Kobayashi, suggesting the event is more about cross-promotion than deep musical integration.","twitterPost":"Project Sekai's Deemo and Cytus collab adds one new song, 'SAIRAI' by Shinichi Kobayashi, prioritizing campaigns over content.","threadsPost":"Project Sekai's collaboration with Deemo and Cytus runs just 13 days and adds only one new song, 'SAIRAI' by Shinichi Kobayashi. The event leans on login bonuses and a gacha rather than a substantial tracklist, which suggests the partnership is promotional in nature rather than a deep musical crossover.","newsletterBlurb":"Project Sekai kicked off a collaboration with the Deemo and Cytus series on June 21. Players can earn furniture, costumes, and a limited title through login bonuses, a premium gacha, and stamp missions. The song \"SAIRAI\" by Shinichi Kobayashi has also been added to the game.","attributionJson":"[{\"source\":\"4Gamer.net\",\"url\":\"https://www.4gamer.net/games/476/G047609/20260619046/\",\"title\":\"Project Sekai Holds Collaboration with Rhythm Games DEEMO and Cytus\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4317,"outputTokens":532,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1782024563,"createdAt":"2026-06-21T06:42:44.000Z","publishedAt":"2026-06-21T06:47:20.000Z","updatedAt":"2026-06-21T06:47:20.000Z"},"cluster":{"id":"c_54688bef7ad8a67eee8f3170","canonicalTitle":"「プロセカ」，リズムゲーム「DEEMO」「Cytus」とのタイアップを開催","representativeArticleId":"a_2c437070c60e3ea4ee91632b","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":false,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"Project Sekai: Colorful Stage! feat. Hatsune Miku\",\"DEEMO\",\"Cytus\"],\"studios\":[],\"people\":[],\"type\":\"announcement\",\"domain\":\"games\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-06-21T06:00:00.000Z","lastSeenAt":"2026-06-26T10:28:13.000Z","updatedAt":"2026-06-26T10:36:56.000Z"},"attribution":[{"source":"4Gamer.net","url":"https://www.4gamer.net/games/476/G047609/20260626047/","title":"「プロセカ」，[DEEMO×Cytusシリーズ]タイアップ記念楽曲の「Masquerade」を実装"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["Project Sekai: Colorful Stage! feat. Hatsune Miku","DEEMO","Cytus"],"studios":[],"people":[],"type":"announcement","domain":"games","is_roundup":false},"keyFacts":["The collaboration launched on June 21, 2026, with a login campaign rewarding MySekai furniture 'Mirai Statue,' a 'Piano Fudge Cake,' and a 'Blue Flower Drink' for logging in by June 28.","A premium present gacha guarantees at least one ★4 member and includes limited costumes 'Alice Good Night' and 'felzione' along with a custom profile sticker.","A stamp mission offers a limited title for completing all tasks.","The song 'SAIRAI' by Shinichi Kobayashi has been added to the rhythm game and can be obtained with Music Cards from the Music Shop.","The collaboration runs through July 3, 2026."]}