Shibou Taijou Suru Hazu no "Setteijou Saikyou Chara" ni Tensei Shita Ore wa, Subete no Shibou Flag wo Hataki Oru Koto ni Shita

Our protagonist was reincarnated in the world of the game "Varia Blade" that he liked in his previous life. The problem is that the reincarnated character dies before the start of the main story. It was Jill Hurst, the mysterious warrior. He knows everything about the game world, but he doesn't know "when and why he will die." Although he tries to somehow avoid death based on the knowledge of the game in his previous life, he encounters the princess, Serine, who was his escort while alive. Jill, who has met as planned, finally decides to meet all the death flags with his strongest power, but -!? A new era of fate-altering x school warrior fantasy begins! (Source: Fantasia Bunko, translated)