The MC does have a few love interest characters in the story, however he does not have a partner as of chapter 843. I'd say there are 2 girls who are likely to fill the roll but, you never know.
The MC does have a few allies that remain and train with him. Although there is a singular MC, his companions stay relevant.
There is a cliche progression, of stronger and stronger like DBZ. If you can bare it, give it a go
Now our former MC who is known as a great hero in the history books must now restore himself to full power. The world is different from before, all of his friends and family have perished long ago. Much knowledge of past has vanished while new knowledge floats around that his been discovered. Many old secrets, important secrets have long since become extinct from the world. Follow Azell with memories of his past, reflect the present as the threat of the Demon Dragon King has no disappeared and plans to make his own return! The supporters of Co-existance and freedom and the Demon Dragons Kings oppressive rule are still fighting in the shadows even now. The war may have ended, but the world is far from peace...
The story follows Long Haochen the proclaimed Scoin of Light, a person with immense natural talent and a character of purity. He stumbles into a world of fighting and bloodshed and works diligently for his father's acceptance. Growing up his father trains him very hard, brutally even. Long Haochen progresses and soon enough to begins his journey on his own. By the age of 14 he enters a completion to be placed in a demon hunt squad, a honor and privilege ment for the best of the generation. Progressing through he qualifies and meets the love of his life, of which comes from similar circumstances. His squad of misfits, enters the true world of combat against demon kind. Learning the secrets of the world, the source of the demons and humanities dark past. Also training to be the strongest, to protect those of his family, squad and all of f humanity.