My Range is One Million - Chapter 77: A Bad Idea 2

In the past, the giants of the heavens and the gods were destroyed after the reincarnation of the world! Cruel curse, eternal hatred, Tan Yun is determined to never sink again! For the sake of loved ones and relatives, from now on, step on the corpse of the enemy step by step to surpass the peak! Defying the sky, killing all worlds, I am the only one!

- Description from novelbuddy

When Li Xianyu was 20 years old, he received his father’s inheritance, an 18-year-old great-grandmother who was incredibly beautiful.

Li Xianyu: “Great-Grandma, why are you so young?”

Great-Grandma: “That’s because I died when I was 18 years old.”

- Description from Novelupdates

In the 41st millennium, darkness rages across the galaxy!The Imperium of Man has lost half of its territories.Millions of planets have fallen victim to the invasion of Chaos!Famine, crime, and heretical cults spread like wildfire…On the planet of Urth, located in the Imperium's dark zone, extreme suffering is taking place.Fortunately, the savior, Eden, has arrived!He awakens to the essence of the Warp and leads his people to prosperity!Starting from a small, broken territory:Farming, building armies, managing internal affairs, unifying the planet, creating Space Marines, forming a fleet, embarking on a grand expedition...When the Lord Regent leads the Imperial fleet to reclaim lost lands, he gazes upon the flourishing star systems and the sky-darkening armada, then looks back at his own ragged ships and is left dumbfounded...Who is the true Imperium?[Raw: 官场职场 > 战锤：从行星总督开始]

A fluffy, sweet modern GL story about a mature older women and a cute university student.