The latent animal instinct and playfulness that humans possess is set free in a small space. These sofas were designed based on the thinking that, even if living environments change, basic human movements such as sitting and lying down remain unchanged. It's possible to sit, lie down, find one's own place, and climb. These pieces have been named after Saruyama (Monkey Mountain), which they resemble, and are divided into three unchangeable shapes but can be put together to form one large round sofa.