When Subaru Natsuki renders the convenience shop, the last thing he expects is to be wrenched out of his regular life and fell into a dream world.
Things are not looking great for the bemused adolescent; nonetheless, long after his birth, he’s attacked by a few thugs. Equipped with just a bag of groceries plus a currently useless mobile phone, he’s quickly beaten into a pulp.
Luckily, a mysterious beauty named Satella, in hot pursuit following the person who stole her insignia, occurs upon Subaru and rescue him.
To be able to thank the fair and kindhearted woman, Subaru offers to assist in her search, and after that night he finds out the whereabouts of what she seeks.
But, Subaru instantly reawakens into a recognizable scene–faced with precisely the exact same set of thugs, fulfilling Satella around again–that the enigma deepens as background strangely repeats itself.