In the first post, she said "Master" and recommends her "Master" to not go further
Is she a part of an investigation team?

and in the 3rd post, she's in the same school as the parent post, maybe the school is corrupted when the sun sets or it's the old building part of the school?

And in the first post, her objective is rescuing a student and in the 4th post a girl told the MC that the art club advisor went missing, maybe she's searching for the art club advisor bc the art club advisor stayed at the school overnight and got corrupted?

in the 6th post, she encounters a corrupted statue from the art club class? or maybe it the advisor who got corrupted? or it's just a normal corrupted?

In the 7th post she met with a guy with a broken hand and in this post she's with the guy looking at the bottomless pool, maybe in the 7th post he's also a part of an investigation team and got wounded, but when he told what he found, she won't believe it and so she wants to investigate it herself

Waifupuritypolice said:

In the first post, she said "Master" and recommends her "Master" to not go further
Is she a part of an investigation team?

There's a robot in that image, so it's probably the robot calling the girl "master".

Also, this is definitely long enough that it needs a pool instead of a chain of 8 child posts...

NWSiaCB said:

There's a robot in that image, so it's probably the robot calling the girl "master".

Also, this is definitely long enough that it needs a pool instead of a chain of 8 child posts...

That was supposed to be temporary, but I lost track of what I was doing.

NWSiaCB said:

There's a robot in that image, so it's probably the robot calling the girl "master".

I see a drone in that post, maybe she's communicating with her master through the drone

Waifupuritypolice said:

I see a drone in that post, maybe she's communicating with her master through the drone

It's clearly the drone talking to her.