Official Career Storm - Chapter 338

[You have entered the dungeon at Gwachun Station’s 1st Exit.] When former high school student Kang Woojin finds himself returned back to Earth after being forcibly summoned to a foreign planet for 20 years, he soon finds that Earth is not the same, normal place as he once remembered it to be.

The MC (Minato) is a college student who died in a plane crash and was reincarnated in a fantasy world. He was raised alone in the wilderness by his succubus mother, and now he tries to make his way as an adventurer.

Unidentified girl, a strange and familiar world. What she was looking for was not only the secret of her life experience, but also the truth about life and death. The boundary marker that appears in the dream is an obstacle or an opportunity. After falling into the vortex of fate, how the girl will choose, guard the rules, overturn the rules, and the trajectory of the world will be completely different.

[The book is suspenseful and mysterious. The number of words is expected to be at least one million. It is definitely not supervised. The new book and the new book hope that everyone will give more opinions and be grateful for everything. ]

- Description from novelbuddy

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.