From what I have read and its synopsis, I conclude that:
1. This will be a long ride
2. Although the grammar is not perfect, it is good enough
3. The story will be leveling up, gain manual from roulette, fight enemies, travel multiverse (I only read until Chapter 2)
4. As the synopsis said that, there will be a conspiracy, maybe there will be plot twist at the very end, for example, the system was made by powerhouse who want to control multiverse, or the system was a reincarnation of a powerhouse and want to control the host to revive
5. Until chapter 2, the MC gives me an impression that, first, he is not smart mc, second, he is easy-going, third, he is not an experienced MC, fourth, he might be killed for a woman
6. All in all, this is a pretty good novel for people who like mysterious and unpredictable endings while it is not serious all times.