CHiCO, vocalist of CHiCO with HoneyWorks, has finally made her solo debut! Her debut single, "Ace", the ED theme for the TV anime "Shangri-La Frontier", is a rock song written and composed by DECO*27, a vocalo-pop artist whom CHiCO professes to admire, to inspire her to take a new step forward. Includes three tracks in total. This edition features a jacket that was photographed by CHiCO. Jacket sticker is enclosed.