At Cafe Seiren, Tsubasa reveals to Itsuki that she has been assigned to do a meet-and-greet with her fans, but is uncertain as she has severe social anxiety, not even being able to shake Itsuki's hand as practice. Itsuki proposes that she do a free sample as practice, which she agrees to.
At Shibuya Station, Tsubasa begins handing out free samples to passerby, with Itsuki offering her advise on her approach. Eventually, she forgets about her anxiety (and by extension, why she was handing out free samples), and develops a new sense of confidence, causing her Performa to awaken. After performing Radiant Unity, Caeda gives Tsubasa one last word of encouragement before she departs. The meet-and-greet is a success, with noting that she feels she has gotten closer to her fans via the event.
Completing this side story unlocks Tsubasa's Special Performance Debut Smile.