Counterattack System appeared when I'm already At The Mahayana Realm - Chapter 177 - 176: The Extremely High Potential of the Ring Universe

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates

Junpei Takeda, a high school student, is childhood friends with Noriko Tatsumiya and is bullied by Kido Shouta. One day, while bullying Junpei, they (Junpei, Tatsumiya, & Shouta) were suddenly summoned to a different world by the whim of “God”. Summoned Heroes with cheats, or so he thought. But it turns out Junpei’s stats were even worse than an average farmer. Tricked into a deathly labyrinth by the only one he trust, he walks the journey for revenge.

In her previous life, she had wronged and divorced the man who truly loved her, and by the time she realized her mistake, it was too late.Now, granted a second chance to make things right, she carries the knowledge of the future. Will she seize this opportunity to redeem herself?“Hubby!” she purred playfully, her cheeks flushed with embarrassment.“Call me that again, and I might just devour you right there,” Rowen warned, his gaze locking onto hers with a smoldering intensity.Follow Vanessa as she sets out to seduce her ex-husband in this dramatic, heart-pounding tale.

Business elite Wu Bin suddenly died and reincarnated into a college student in a parallel world.Just as he joined the freshman military training, Wu Bin realized something was off.Why was his body weaker than a woman’s?Wu Bin had thought he could use the system to change his physique and reach the pinnacle of life!But who knew, in the next second, the style shifted dramatically!Ding.【Congratulations, Host, for successfully acquiring Acute Myocardial Infarction】【Beware, when your heart rate exceeds 130, Acute Myocardial Infarction will be triggered 100%】Hiss!Are you serious with this crappy system?【High host dissatisfaction value detected, special gift package for beginners】【Congratulations to the host on your gift— Scorn of Death】【Congratulations to the host on your gift — Rebirth from Cocoon】【Congratulations to the host on your gift — Iron Will】Consequently, the ordinary college student Wu Bin became a regular at the major hospitals in Shanghai.The campus belle was smitten with him, the principal prayed for him, and the instructor treated him as his own biological father!“Why can you fracture a bone just by going to the bathroom!”“How dare you travel all over with only 1 platelet?”“This batch of college students, they're very fragile, hard to kill!”