chou eshi ten ~if no gakkyoku sekai ten~
An annual exhibition managed by Niconico under its Niconico Chokaigi artist platform that runs during the last full week of April. Its theme is "what would the world look like if the artists were different?", where artists are given a list of themes by VOCALOID producers based on their songs and must reinterpret them in their own styles.
It features approximately a hundred artists, with four artists each drawing one of the 25 songs available.
