What is project sekai events?

As an AI language model, I do not have access to the latest information on project sekai events. However, I can give a general overview of what project sekai events are.

Project sekai is a music game that features virtual singers and is developed by Sega, Craft Egg, and Colorful Palette. Sekai events are in-game events that introduce new songs, costumes, and stories to the game. These events usually last for a few weeks and involve completing missions and collecting event points to unlock rewards.

Some of the sekai events that have taken place in the past include:

1. "Falconer's Attack! Idol Heroes of the Sky" event featuring songs inspired by Japanese anime and manga.

2. "Phantom Thief Diana's Heist" event featuring songs with a heist and detective theme.

3. "Hokkaido Summer Adventure" event featuring songs and costumes inspired by the beauty of Hokkaido, Japan.

Overall, project sekai events are a great way for fans of the game to engage with new content and challenge themselves to unlock rewards.