Honestly, it's not a good story, but it's good enough to read when bored.
Out of everything in the story, I hate that guilt trapping the most. ML sacrificed his life for MC, so MC must commit murder for the both of them to go back to their original world.
Somehow the story holds together, but there are some plot holes and flaws. Thankfully some of them are addressed later in the story one way or another.
Surprisingly, I like MC and ML, which is rare, but they're quite decent. Although I feel they're a bit bland, and it's hard to feel "soul" or "personality" in their characters.
Overall, it's a good read. Unfortunately, the biggest disappointment is that the story hasn't been updated in years, and worse, the last six chapters were uploaded by mistake. Destroying hope of knowing what's next even, if not getting to know the story final ending.