People are collapsing, but if you take your sister to the dungeon, you will become stronger

Ji Ran traveled to the collapsed world.
In this world that is extremely unfriendly to men... well, to humans, Ji Ran felt a little flustered.
However, after obtaining the [Dungeon System], he felt that his survival might have been somewhat guaranteed.
But because there are two options when downloading a copy.
The first one is to kill through the dungeon by yourself, this kind of difficulty is too high, just skip it.
Even if a person adds a buff to the player, skip it!
In the second case, although the buff given to the player by the system will be weakened, teammates will be randomly matched.
then……
Kiyana: [Huh?There are so many interesting things in this world? 】
Alicia: [Hmph, it seems that I am also very popular in other places? 】
Bronya: [This is a new game?Well, Bronya accepted the challenge!Watch Bronya pass the level with her life! 】
Leiden Mei: [I want to ask, this dungeon can make me stronger, and I can control the core strength of the Herrscher by improving my own strength, right? 】
Lei Dian Mei: [Then what the hell are the three hundred dishes of Chinese home cooking (╯‵ ′)╯︵┻━┻]