VTuber 女子團體 hololive 與日本連鎖風呂「極樂湯」宣布第四度合作，祕密結社 holoX 沙花叉克蘿耶、鷹嶺琉依、拉普拉斯．達克尼斯（暗黑）、風真伊呂波、博衣小夜璃六人將換上特別浴衣登場，還有剛出浴的的包毛巾立繪！
RAKU SPA 旗下連鎖溫泉品牌極樂湯在日本全國都有店，以泡湯附餐飲、三溫暖、一般澡堂等齊全的平價服務聞名，時常與 ACG 品牌合作，去年與 hololive 聯動適逢生雞蛋大缺，天音彼方的專屬料理「蛋包飯」難以正常供應，讓天使本尊都大吃一驚。
而本次與 holoX 聯名自 4 月 25 日～ 5 月 29 日在 RAKU SPA 集團 32 家分店舉行，除了販售原創商品、限定實體布置，更根據 holoX 成員設計香氛推出期間限定的合作溫泉（下圖可點擊放大）。
極樂湯各店內也會放送成員獻聲的廣播，入館泡湯買 holoX 套組（990 日圓）就能獲得限定毛巾。
holoX 極樂湯聯名限定周邊有壓克力立牌（浴衣與包毛巾分本尊與 Q 版）、徽章、鑰匙圈、入浴劑、掛軸、束口包、文件夾等，不只會在活動期間實體店販售，4 月 25 ～ 6 月 5 日也會在極樂湯線上商店 GK Store 販售。
合作餐點火力全開，holoX 每個人至少一款飲料、兩款主食，小天使風真的烏龍冷麵體現「野菜生活」的概念，示意圖上放了完整的 4 條茄子：
每點一份原創餐點就能獲得隨機杯墊，全數 15 款，湊齊背面就能拚出 holoX 出浴圖，彷彿螢幕飄出香氣啊嘶～更多合作資訊與活動舉行門店可參考官方網站。
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