AtHeart

AtHeart is a seven-member girl group under Titan Content. The lineup consists of Arin, Michi, Katelyn, Bome, Seohyeon, Aurora, and Nahyun. The group introduced its members gradually from 2024 into 2025, released the pre-debut single Good Girl (AtHeart), and officially debuted on August 13, 2025 with Plot Twist. Their fandom is known as Heartbeat.

AtHeart's early identity centers on polished pop, individual member visibility, and a social-media-friendly rollout that lets each member show a distinct personality. After debut, the group expanded the Plot Twist era with Plot Twist (English ver.) and Plot Twist (Remixes), then continued with singles such as Shut Up and Butterfly Doors.