The Kingsbury door.

I just have the front page left.

Hey, the door is open.

The second this door opens, I'm jumping into the first bed I see and passing out.

That was Beatrice-sama's Door Crossing.

And after five minutes passed, the door finally opened

When that door is opened, something will change.

What are you doing at the door?

I went to use the restroom, but I didn't have my ID card, so I couldn't open the office door.

In others words, this door was never intended to be accessible to players!

You know, I'd like you to close the classroom door if you open it...

Since this is the door to the rooftop...

Come to think of it, there's a door on the second floor...

You're free to play as long as this door is closed.

But due to that suddenness, I felt as if the door to my heart has become unlocked.

Well, the door's pretty tough.

Now, boy, you can leave the room through that door.

The door to the unseen world...

It's just on the other side of this wall, right?

Step through the door.