Re:Zero -Starting Life In Another World- Vol. 1 (Light Novel)

Obsessive gamer Subaru Natsuki is one day summoned to another world to assist a half-elf girl named Emilia. In his quest to help her, he discovers (through his own death) that he now has the ability to reverse time by dying while retaining all the memories of his past life. With this new ability, and the inability to return to his own world, Subaru begins life anew with new companions and new mysteries. And soon, his fate becomes tied to Emilia’s as he helps her to become the next queen.
Notice: This book is written in Japanese.