A colossal asteroid is on a collision course with Earth! Despite humanity's best efforts, a massive asteroid is hurtling towards our planet, signaling the end of life as we know it. Amidst this impending doom, an ordinary Korean office worker named Cheolsu is unexpectedly granted the opportunity to travel back in time and avert this catastrophic event. Does he stand a chance at saving the world?
Original Webtoon
Official Translations: English, French, German, Japanese


Good enough to make you think. There are some plot holes but nothing too detrimental to the story. The sci-fi is serious, weirdly enough the least acceptable part is the 20 years timeskip every time.
The series only gets better, a great and serious sci-fi regression with lots of world-building and quality-everything
One of the best series I’ve ever read, good science fiction, but most importantly great characters.
I think this is a good change of pace from the other types of fantasy regression manwha out there. The mc is a bit op with his knowledge but it makes sense considering the time that he has to learn the content. The whole deal with the backstory behind Rama was never really talked about which was fine and I wished that the romantic subplot was more fleshed out but it's alright. Very good overall albeit a bit fast in some areas at times.
for recommending this awesome manhwa, that is
I went in blind, it’s a masterpiece. A hell of a story, twist and turns.
Read it.
This is really good and a little bit sad in same time.
An asteroid will destroy Earth. MC is looping and try all sorts of different means to survive. Recurrent time skip. A scientistic manhwa. MC doesn't keep his memories intact each time. There have light romantic subplot but as you can expect they don't keep their memories so this is basically reset... don't hope much so far.