SSS Class Necromancer - Chapter 16: Parting ways

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

An alien race invaded the Earth on June 6, 2128. At the midst of this war, many nations allied with the alien threat and the war nearly wiped out the rebelling humans of the planet. At the edge of mankind's survival, the United Nations Army launched its forces to eliminate the immediate stellar threats that loomed over Earth.

General Seeker Carlean, commander and leader of the mission, risked and gave his life to destroy the immediate stellar threat. The battle was won though Earth lay in ruins. Perhaps mankind will live to see a few years of peace before the alien threat returns to wipe out their existence.

At the immediate aftermath of the stellar battle, the fallen Seeker Carlean awakens and finds himself at aged 17, living the peaceful life he lived 16 years before he died.

So begins a new game in the battle for humanity's survival.

All the firsts I want to remember were with you.From the summer when I was eighteen and knew nothing to the summer when I turned thirty-one and learned so much.Even the seasons without you felt like you were deeply ingrained.“We’re just friends, so there’s nothing special between us.”You pushed me away with a poker face, but because we were friends,I endured those countless days,and it seems you still don’t know it.So, it looks like I’m going to repeat the same futile effort.“Did I ask if you needed a man? If you do, I’ll be your man.”You need to get to know the thirty-one-year-old me.If you look at me with those eyes you didn’t see before.“You’ve become a real troublemaker.”Now that you’re here, it’s just the beginning of .

“Can’t I properly read stallion novels anymore!”