AtHeart (앳하트) is a South Korean girl group under TITAN CONTENT. They released a MV for their pre-debut single 'Good Girl (AtHeart)' on March 14th, 2025, digital release on May 29th, 2025 and officially debuted on August 13th, 2025 with the EP 'Plot Twist'.

The groups name 'AtHeart' was formed by combining the words 'Heart' which represents the heart and love, and the word 'At' and the '@' symbol which means connecting to the hearts of fans around the world and the growth, communication into the new world. The group is composed of Michi (미치), Arin (아린), Katelyn (케이틀린), Bome (봄), Seohyeon (서현), Aurora (아우로라), Nahyun (나현). Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.