The Beast Within (Shinkai/Kaishin)

Spider

Blinding lights and screaming fans, Shinichi was impressed by what he saw. After his ticket had been scanned and he had found a place between the audience, his eyes were fixated onto the man with the blond hair and a tuxedo onstage. Gunther von Goldberg, his brain screamed at him. Without removing his glare from him, the male fumbled for his glasses and took them on to zoom closer onto him. What he saw was the ultimate hint for his identity.
A large spider tattoo over his left eye.

Shinichi gasped and took off his glasses. He had never been so sure than now. This man was the one who had turned KID into a monster, into the monster he felt addicted to. Anger began to bubble up inside his guts, Shinichi felt so enraged, betrayed- he didn't even know where this came from. But this guy over there, on the large stage, in this dark blue tuxedo with his smug grin, he was the one who had taken his rival and ally and left a devil.
Shinichi wanted to scream. Get up onto the stage and scream at this person who had taken the one he loved most. He couldn't even know wether KID was still alive or rotting somewhere like his memories were. Two weeks without any sign of him, two weeks without any new information to his whereabouts. What if KID was in his claws? Shinichi didn't notice how his breath fastened, how his heart threatened to jump out of his chest. Clenching his fists, Shinichi turned and made his way out of the crowd.
He had a backstage pass.
He was going to wait for him.
Spider wasn't going to escape again.

"Gunther von Goldberg, alias Spider. Assassine. Hakuba is also on your trail but I am not like him. You took something from me... and I advise you to give it back before I will send you to prison once and for all."
Spider looked up from his materials and the first thing he noticed was the backstage pass around Shinichi's neck.
"Kudo Shinichi, detective... what a pleasure to meet you but I'm afraid I don't understand what you are asking me to give back."
Shinichi narrowed his eyebrows and took a step closer, grabbing the collar of his jacket.
"Don't play dumb on me!" Why was he acting like this? Shinichi never attacked a criminal like this, even someone like him. But this was about Kaitou KID, Kuroba Kaito, and this smug grin this bastard was giving him made his blood boil.
"Please let go of me, Kudo-san. This doesn't suit a detective of your reputation."
"Shut up!" Shinichi glared at him, voice full of disgust and venom. "This..." he growled, lowering the volume of his voice, "-is about Kaitou KID. You took his memories. You made him obsessed over killing me. You turned him into a monster. And now... now he is gone! Where is he?! I demand you to fix him this instant!"
Before Spider was able to open his mouth for one of his irritating innocent acts, Shinichi pulled him slightly down and tightened his grip on his collar.
"Don't you dare deny any of this... KID spilled everything. About the man who claimed to be his partner, Snake. About you, the one who turned him into this." It was a bluff but certainly a good one, regarding how Spider's eyes suddenly turned less warm. Deadly, intoxicating, Shinichi felt like suffocating any second. His body didn't obey him any longer. Almost frozen he stood there, fists shaking, echoes of the leftover applause from the audience outside ringing in his ears. Impossible, this couldn't be real. Shinichi tried to move but none of his muscles budged.

"You couldn't leave it, could you? Kudo Shinichi... this time, you really know too much. But I can't just let you disappear in here..."

Shinichi wanted to open his mouth but his lips remained closed, his jaw was as tensed as ever. Slowly but surely, the male started to feel panic in his bones. Why couldn't he move?
Spider, assassine. Traps his victims inside his illusions and causes immobility to them. Enjoys to torture people mentally before killing them afterwards.
Hakuba's notes flashed back and forth in front of his inner eyes. Shinichi felt his control being swept away by those deadly eyes, he couldn't look away, couldn't blink. Caught inside Spider's net, Shinichi almost screamed as he saw a gigantic robotic Spider inching closer from above.
JUST AN ILLUSION, his mind screamed at him while his eyes just kept on staring onto the gigantic golden spider from above, lurking inside the shadows, waiting for the right moment to grab and kill its victim. Spider was gone all of a sudden, Shinichi's hands which were full of his jacket before were now empty.
Dear god, help me...!

A piercing pain made its way into the last parts of Shinichi's concious, the detective tried to scream but no voice left his throat. Blood, so much blood... The disgusting metallic smell reached his nostrils and he wanted to gag. This was worse than any crime scene. Pain, everywhere was pain but all Shinichi could see were those three large and red orbs in front of him which hypnotized him, made him obey, took away his every will.
Shinichi found himself back in reality on top of the building as a large splash of water came over him. Shivering and trembling, he shook his head and blinked thrice, unsure about what had actually happened. He came face to face with a concerned and irritated Hakuba Saguru, an empty bucket in hand.
"H-Hakuba-kun...?!" he stammered, he had never seen the halfbrit so outraged and at the edge of his abilities. Said one swallowed dry and collapsed onto his knees, exhaling relieved.
"Y-you're alright..."
Hakuba shook his head, then picked up the eye contact again and Shinichi finally started to look down on himself. His left leg was obviously broken... and dear god, he was full of bruises and blood. Shinichi felt so disgusted of himself. These wounds weren't made by KID.
How did Hakuba find out about this? Ah it was obvious, Hakuba was after Spider since way longer than he was. Probably he had bought a ticket as well to surveil Gunther von Goldberg

"Kudo-kun pay attention!" Hakuba yelled and tackled the male back onto the ground, a gunshot splitting the air around them. Shinichi screamed at the sudden movement his leg was forced to make, again ripped out of his thoughts and his eyes searched instead for the one who had shot onto them. Hakuba rolled a few meters further but was on his legs in the same second, evading another gunshot.
There he was.
Spider stood in full costume before them, tiny blood sprinkles all over him, a gun in his hands. Shinichi could barely see, the wind was too strong and the pain numbed his mind. He felt so dizzy, so incredibly weak.
"Die, Kudo Shinichi!"
Shinichi stared right into the barrel of the gun, swallowing dry, unable to evade or even get up. Hakuba grew wide eyes, utter horror on his face. He couldn't prevent Spider, he didn't have a gun with him. There was nothing either of them was able to do. This time, it was over. The echo of the clocktower close by reached their ears, cheering for Shinichi's death. Midnight.

"LADIES AND GENTLEMEN~!"