Zero Base One's Seong Han-bin and Kim Tae-rae transformed into the main characters in a web novel and showed off their unique charms. He played different characters, from a grumpy prince to an Undercover agent to a tough racer, and showed a different side of himself than on stage. On the 1st, a campaign video for the artificial intelligence entertainment content platform Crack, in which Seong Han-bin and Kim Tae-rae participated, was released. In the video, Seong Han-bin transformed into the ‘gritty prince’ from the web novel. Contrary to his sharp appearance, he showed off his unexpected charm by playing a character who is friendly only to the other person. Next, although he is usually timid, he actually transformed into a character set up as an Undercover agent, expressing his changed eyes and mood. Kim Tae-rae took on the role of a tough racer and showed off an intense atmosphere that was different from her usual soft image. Next, he expressed conflicting emotions by acting from a friendly senior in the library club to a character who reveals his true self hidden with scars on his face. Sung Han-bin and Kim Tae-rae played characters with different narratives one after another through this campaign. He expanded his scope of activity by embodying characters in fantasy web novels through natural dialogue processing and facial expressions. Zero Base One, which the two belong to, is continuing various activities for each member along with music activities. Sung Han-bin and Kim Tae-rae also showed new appearances off stage and expanded the scope of their individual activities through this campaign. Zero Base One plans to meet fans through various activities at home and abroad in the future.