Sword Art Online - Vol 1 Chapter 5

Elijah unexpectedly travels back to the day when the virus broke out. Confronted with his zombified roommate and the perilous situation of the roommate's girlfriend, he decides to take action. In this post-apocalyptic world, he vows to become the strongest man and create an incredibly secure refuge.

The story begins with Elijah's rebirth as he discovers the opportunity to change the future. He becomes close companions with his roommate Bella and her husband Alexander. However, when Alexander is infected and turns into a zombie, Elijah must act decisively to protect himself and Bella.

Elijah awakens to a supernatural ability called the “Seed of Consciousness,” which allows him to control zombies, becoming his weapon for survival. He uses this power to strengthen himself continuously and seek the path of survival. However, his relationship with Bella starts to undergo subtle changes, forcing him to confront emotional challenges.

As the story unfolds, readers will immerse themselves in gripping plots and complex character relationships. Elijah's growth, struggles, and emotional development with numerous women in the post-apocalyptic world form the core of the story. It's a world full of challenges and opportunities, and Elijah's narrative is about continuous growth and overcoming oneself, showing readers the hardships of surviving in the apocalypse and the complexity of human nature.

Failing in his job hunting, Sanada Kyouichirou was hopeless in this society. When kyouichirou had thrown himself towards the bottom of a cliff. When he woke up his body had returned towards when he was in fifth grade of elementary school. He did not want to have any regrets in this life so he had decided on building up an harem in this second life.

The elder sister that he admired, a senior and president of the student council at a school for rich young girls, a strong minded upper classman at school. The poison fang of Kyouichirou who had pretended to be a innocent child attacks those girls.

Qin Chuan arrived in a parallel world and got bound to a system.