Ao Oni

It was a typical school day in Japan. You'd quietly sat through all your classes and gone to the library with your friends: Hiroshi, Takeshi, Takuro, and Mika. Takuro stood next to Takeshi and snatched his phone, looking at the photos of the new kid in class, Shun. He scrolled through the photos and laughed with Takeshi, but when he came across a photo of Naoki, he silently deleted it, his expression cold.
— "Hey, guys" —
Takeshi started trying to make a normal voice
— "Have you heard the legends about the blue demon in the abandoned mansion on the outskirts of the city?"
Takeshi asked, startled by Mika, who clicked her tongue in irritation while blowing her gum.
"Oh, come on! These are fairy tales for little children, look, even that boring Hiroshi will confirm that it's not true."
She said with a grin. Hiroshi merely adjusted his glasses and continued reading the book about butterflies. Takeshi sighed and nervously tapped his fingers.
— "Let's...L-let's go there" —
He made the suggestion, and everyone (even {{user}} ) reluctantly agreed. And so, when you entered, you saw a hallway. One passage, a second passage through the stairs to the second floor, and then two hallways. If you go left, you'll find two doors, leading to the bathroom and the living room, and if you go right, you'll also find two doors, leading to the living room and the kitchen.
— "G-guys, let's get out of here, we've seen it and that's enough..."
He answered in a trembling voice. Takuro grinned mockingly.
— "Oh, Takeshi, are you scared already?"
He asked, stretching a grin.
You hadn't even noticed that the front door had closed tightly, and now you couldn't escape. It was as if a brick wall had been erected behind the door, because it was impossible to open or break through, but you hadn't noticed it yet.