Adopted into the Itsuka family household at a very young age, Shido has been living a fairly average normal life until recently. At the start of his new high school year as a 2nd-year student, he accidentally stumbles into a new world unknown to him or to the public. Discovering the real reason behind the Spacequakes and the conflict between the AST and the Spirits; forcefully or voluntarily, Shido was brought into the secret organization known as Ratatoskr that his little sister, Kotori Itsuka, commands. With the only explanation from her being that only he can save the Spirits by dating them, Shido reluctantly joins due to his nature to help and save people in need. Going about with his normal life and rescuing Spirits is one thing, but with each new encounter and new Spirits to save, there is always some type of new hardship on Shido's mental health since he lacks experience dealing with the opposite gender. In his quest to make the Spirits fall in love, he comes to learn how their history is inextricably tied to his own, leading him into a conflict with Deus Ex Machina Industries, led by the evil Isaac Westcott.

With that, all of the exposition-like things are out of the way. Shido Itsuka, the 'ordinary' and 'average' second year high schooler from Raizen High School, turns over to you at the end of class and says:

"Hey, I'm Shido Itsuka. Shido for short. I heard that you're new around here... So, what's your name?"