A commemorative work by T.J.P.P.A.L, led by Tsutomu Totori, who appeared on television programs such as "Sekai no Hate made Itte Q!" and "24 Hour Television" and gained popularity. It contains a work by Taiki Nishihara, who has walked 40 years in the music world with Jyuttori, and the newly written piece "Raindrops" by Tsutomu Narita, known for many game music works including "Granblue Fantasy". The percussion instruments made of wood, iron, and leather have extremely simple material origins. The album is filled with sounds woven through unwavering determination to sublimate them into musical tones and through repeated exploration.