Singer-songwriter Ai Higuchi's fourth original album "Saiaku Saiai" is being released on LP. Includes 11 tracks in total, including "Akuma no Ko," the ending theme for the NHK General TV anime "Attack on Titan" The Final Season Part 2, and "Yukari," the ending theme for the TV Tokyo Drama 24 series "Ikiru toka Shinu toka Chichioya toka," which began airing in April 2021.