Tensei Shitara Slime Datta Ken (WN) - Chapter 22 – The Adventurers who finally arrived

The aliens came with hostility.
Facing the invasion of aliens, human beings are weak like ants.
So this is the end, the real end.
But there is resistance when there is an invasion.
For some, this is not the end, it is war.
So this is war.
Real war!

- Description from Qidian

Never should be exposed, just the two of them in their youth.「I’ll be making your meals from now on, Sensei.」I, Reiyu Tenjō, am a high school teacher.When I shared some food with my neighbor, it turned out to be my student, Yuunagi Nishiki. If this fact is discovered, I might be fired from the school?That’s why we signed a 『Neighbor Agreement』 in order to keep our secret.Since we both live alone, the plan was to help each other out when one of us was in trouble——but somehow, I got won over by his cooking.Instead of helping him, I find myself increasingly spoiled and dependent that I can’t live without him anymore.‘No, Reiyu Tenjō. He’s your student, someone you are not supposed to fall in love with!’Drawing closer and then apart——their love sways ambiguously like waves.A youth romantic comedy filled with secrets between a teacher and student begins here.

This is the era where people prioritize science and Martial Dao. After the great disaster, the human race discovered the Ancient Zenith civilization. They entered the Age of Great Cultivation and began their journey to colonize the Kunlun Realm!

Before going to college, an ordinary high school student went to celebrate and got drunk. When he woke up, he found himself in a completely different world. There was a big sect, the approaching sect entrance examination, a slum where his body’s previous owner lived, and a shared memory about a missing young girl.

When he got tangled in a fight with a few punks in this different world, he fell off a cliff and miraculously found himself still alive, with two more voices ringing inside his head. They were Sword Master and Saber Master. In the company of them, he continued to find out more about this whole new world. He took the sect entrance examination, entered the sect, met a strange man in black, and even participated in a major competition of the sect to have a chance to win over his peers!
In this whole new world, he was born again and got to explore the fantastic martial world!

- Description from Novelupdates