After an abrupt fuse with a parallel-universe, Tokyo had been mutated as part of the world called Amasia, which is on the brink of destruction. The residents of Amasia claim that the main character, Ryoma Narusawa, is the “Prisma”, who is destined to save their world from collapsing.
Ryoma must find a way to defuse the worlds in order to bring things back to normal. Will he be able to save the many who are at the verge of becoming nothingness along with the two worlds?
Exstetra is a game that involves having to kiss in order to save the world. It may sound a bit confusing to think about how an act of affection could possibly save a world… but according to Famitsu, the main character, Ryoma, has the ability to absorb energy called “Ex” from enemies. The Ex can then be used to perform different acts of miracles. One of them being, the ability to kiss his allies to awaken their powers.
According to the people of Amasia, the Prisma is the one chosen to save their world from destruction. They have the ability to absorb Ex from enemies and use it for different purposes. The Prisma Knights are those who’ve been bestowed upon the powers from Ryoma’s kiss and have had their powers awakened. They will also play a role in saving the world by supporting Ryoma.