Virtual idol PLAVE has launched a comprehensive 'participatory fan experience' strategy ahead of its comeback with the fourth mini album 'Caligo Pt.2' scheduled for April 14th release. The album purchase is seamlessly connected to a video call fan sign event in a unified flow, demonstrating an entertainment-commerce-platform convergence strategy. The pre-order sales channels span major Korean retailers including VLAST SHOP, Weverse Shop, Makestar, Musinsa, Olive Young, and Youngpoong, as well as global outlets like TOWER RECORDS, HMV, and Animate, targeting global fandoms. Regional-specific ID PASS versions provide differentiated experiences across platforms. Purchasing the photobook version automatically enters fans into a video call fan sign raffle running from March 24-27, with winners announced on March 28 and the event held on April 19. A total of 50 winners will be selected with 10 per member for one-on-one video calls. All purchasers receive unreleased photocards, while winners receive autographed versions. The video call fan sign employs global platforms like Discord and WeChat instead of traditional KakaoTalk, accommodating international fans with considerations for time zones and languages. This approach transforms album purchases from simple transactions into direct artist interactions, exemplifying a new entertainment technology model that merges PLAVE's virtual idol identity with digital-first fan engagement.