The song of Matryoshka-made in celebration of Miku's birthday. It is one of the most popular VOCALOID songs. Most of the lyrics are nonsensically vague or ridiculous, with a slight hint of pain or sadness, giving the overall song a crazy and psychotic feeling.
It is about a person who hides their true self and the outside of this matryoshka doll is depicted as a completely normal person, however, as each layer is gradually stripped, the true feelings are revealed and ultimately, the core, which is also represented by insanity, is exposed. It can also be interpreted that insanity is the façade that they uphold and as the person descends into the core, their true selves are revealed. Vocaloid Gumi cosplay costume Matryoshka suit can be found at www.eshopcos.com.