Toaru Majutsu no Index: Genesis Testament - Volume 4, Chapter 4: Beyond the Two Choices – Duel_Against_R∴C∴O∴(for_Save_Mother).

Awakening to a post-apocalyptic world infested with zombies and mutated monsters, Alex makes a startling discovery: he possesses a system that grants him access to unlimited resources every day.【Congratulations, you've received unlimited bottled water.】【Congratulations, you've received unlimited 9mm bullets.】【Congratulations, you've received unlimited cold medicine.】...With each system notification, Alex's chances of survival soar while others struggle to stay alive.As everyone else fights for their lives, Alex finds himself living in luxury, residing in a lavish mansion where he leisurely sips red wine and savors grilled delicacies amidst the chaos of the end times...

After retiring from the special forces, Ye Tian is hired by a beautiful boss as her personal bodyguard, leading to a colorful and adventurous life for him...

[Group Pet + Koi + Prediction + Boss + Vest + Food]

The scientific research boss travels through the farmhouse, and the sick child becomes a three-year-old fan who spits milk. Comes with a koi physique, full-level genius doctor skills, and proficient in growing delicious food…

Wait, when did I have an extra predictive skill? The misfortune of the father, mother and elder brother is easily resolved by the milk dumpling, and the unlucky physique of the fairy brother is cured without medicine, and Xinbao only wants to eat, drink, play and be a rice worm in this life…

- Description from novelbuddy

Struck down amid the battle, the Hero and Demon King meet their demise. As their souls linger on the edge of the afterlife, a mysterious force intervenes, merging their fragmented souls together with a new being. Rusty, the living armor, now affected by their memories and presence, embarks on his own quest. Will he seek revenge on those who betrayed the hero, or will he fulfill the desires of the fallen demon king? or instead, forge his own path?