Sou releases his fifth album. In addition to tie-in songs such as "Bakeso na Kokoro," the second cour opening theme of the TV anime "A Terrified Teacher at Ghoul School!," and "Tada, Kimi no Mama de," the ending theme of the TV anime "Zenshu." whose music video has surpassed two million views on YouTube, the album includes digital tracks produced by singer-songwriter mekakushe and the rock band Oishikuru Melonpan. It also features the new song "Q.E.D," selected as the opening theme of the TV anime "The Case Book of Arne," which begins airing in January 2026, along with six newly recorded songs created with notable creators. Limited Edition Type B includes live audio recordings on CD Disc 2 (subject to change) and comes with Photobook B composed of live photographs, housed in a special sleeve case. *The CD included in Limited Edition Type A and Disc 1 of Limited Edition Type B contains the same tracks.