Astartes: Red Sons

This is a story about the Astartes. Langstro, who traveled back in time in the 2k period, just wants to go back to the past, but the mysterious woman who is pressing closer and the Emperor, the lord of mankind in his mouth, regards him as the last trump card to save mankind. The entire cosmic war that split the entire galaxy many years ago, one twisted soul after another and the crazy truth that comes with strength, An ordinary person becomes an ace? Joker or legend? Madman or doomed? It's all in Astartes - The Red Sons