Mallory couldn’t pinpoint when she’d first noticed the monster. She supposed she’d heard it scuttling around in the walls for weeks before it had first attacked, but she hadn’t wanted to acknowledge it. Though she knew it was stupid, a part of her hoped that if she ignored it, it would turn out to be a figment of her imagination.

It wasn’t.

When Mallory stumbled back to her apartment one evening after a long day of classes followed by a busy shift at work, it sprang out of nowhere and tackled her. Mallory’s back hit the floor, and she caught a glimpse of a shiny black exoskeleton and many, many eyes before it savaged her. Claws cut into her legs and sides, and teeth bit brutally into her shoulder. She screamed and flailed, but it made no difference. She could only close her eyes and cry until it ended.

Eventually, the monster crawled away, leaving Mallory a sobbing wreck on the floor. Nearly thirty minutes passed before she managed to pick herself up and limp to the shower. Once she was clean, she rifled through her cabinets and found the first-aid kit, every shadow and creak making her jump. But the monster didn’t attack again. She bandaged her wounds and went to bed, but the hours passed sleeplessly. She could hear the monster scuttling behind the walls.

If anyone noticed her limp or the dark circles under her eyes the next day, they didn’t say anything. When she finally got home, her hands shook so hard that she could barely unlock the front door. She slunk cautiously inside, the muscles of her back so tense they hurt. Whipping her head around, she looked for any sign of the monster. Nothing. Was it gone? She couldn’t be so lucky.

She sat on the couch, waiting for it to appear and attack, every second that passed making her feel more nauseous. But the minutes ticked by with no sign of it. Eventually, she opened her web design textbook and tried to read tonight’s assigned chapter, but she couldn’t concentrate. She kept glancing up and looking over her shoulder.

By the time she got ready for bed, she thought that maybe—just maybe—the monster had left. But then she opened the linen closet and saw its many eyes gleaming from the shadows behind a stack of towels. Mallory slammed the door shut and stumbled back, gasping for air. The monster didn’t burst out of the closet and attack, but it didn’t have to. Mallory knew it was there and barely slept all night.

It went on like that for weeks. Sometimes, the monster would attack; other times, it would just lurk. There was no pattern that Mallory could detect. It happened in the morning, afternoon, and even the middle of the night. An entire week went by once with barely any sign of it, but then it attacked three days in a row. It happened on good days, bad days, and every kind of day in between.

The constant fear and worry ate away at her like termites gradually gnawing down wood. Her grades slipped, and she appeared so lethargic and worn at work that her boss asked if she needed to cut back on her hours. Mallory couldn’t afford that. Falling behind on rent and getting kicked out of her apartment would be tempting if she didn’t know in her bones that the monster would follow her wherever she went.

She slept-walked through her days, exhausted from the anxious nights and constant attacks. After class, when she talked to Grace Cheung—the girl with vibrant blue hair who usually sat next to her—it wasn’t until the conversation ended that Mallory realized she’d agreed to have Grace over for a study session tomorrow.

Cue the panic. Mallory couldn’t let anyone else come into the apartment. Grace wasn’t in any danger—somehow, Mallory knew it was her own personal monster and would only attack her—but Mallory couldn’t bear to let anyone see the ugly, awful thing she’d let come into her life. Her face heated with shame just thinking about it.

Lying was her first instinct. She could text Grace and say something else had come up, but she’d only been going through the motions when she’d written down Grace’s number, and she couldn’t read the scrawl of her own shaky handwriting. All night, Mallory tossed and turned, debating every option from suggesting a coffee shop instead of her apartment to dropping the class and running away. Hearing the clicking of the monster’s pincers as it lurked in her bedroom corner, watching, didn’t help.

By the time Grace knocked on her door the next day, Mallory had thrown up in the toilet twice and was trembling from head to toe. She looked over her shoulder as she shuffled to the door. The monster was nowhere in sight, and she prayed it would stay that way. When she opened the door, it took her a moment to gather the courage to open her mouth and propose the coffee shop down the street, and by then, Grace had already come inside, complaining about their professor and whatever sadist had invented grading on a curve.

Feeling as if she’d lost all control, Mallory reluctantly settled on the couch next to her and opened her notebook. They reviewed their notes and flipped through the chapters of their textbooks, discussing concepts and what was likely to be on the exam. Mallory didn’t have much to say; she was too busy checking the doorway to the bathroom, the space behind the TV, and the cracks in the couch cushions for any sign of the monster. Luckily, Grace was one of those talkative people who could carry a conversation practically by themselves and didn’t notice Mallory’s silence.

They paused for Mallory to make coffee, the hot liquid sloshing out of the mugs and onto her quivering hands as she carried them to the couch. She handed one mug to Grace and sat down. They were just getting back to work when movement caught her eye.

The monster emerged from the coat closet, squeezing its glistening black body under the door like oozing slime. Fear lodged itself in Mallory’s throat, cutting off her air. The monster’s numerous eyes were focused on her, and drool dripped from its mandible in anticipation. Then it shot across the floor towards her on its spider-like legs, and Mallory could only whimper.

That’s when Grace chucked her textbook at it.

The heavy book struck the monster in two of its evil eyes, and it reared back and shrieked. Grace was already on her feet and charged it.

“Hey! Get outta here! Go on!” She kicked it with her red sneaker.

The monster shrieked again. Then its thick claw shot out and clamped around Grace’s ankle. She hopped on one foot, trying to keep her balance.

“A little help?” she called back at Mallory.

Mallory had been frozen on the couch, coffee mug clutched in a death grip between her hands. For a moment, everything seemed to slow, from the monster’s flickering eyes, to Grace’s waving arms, to the very molecules of air in the room. Mallory’s stomach twisted into a knot so tight that it threatened to pull her into ball. She took a deep breath, forcing her diaphragm to expand as the world sped back up.

The mug was the only thing Mallory had, so she flung it at the monster. The steaming hot liquid splashed into its eyes as the heavy ceramic mug smacked it. The monster screeched, its legs twitching, and it leg go of Grace. She immediately stomped on it, and before Mallory knew what she was doing, she ran to help. Kicking and stomping, the two of them drove the monster into the coat closet. Limping, it squeezed itself back under the door, where it let out a muffled, chittering whine.

Mallory stood there, panting, unable to believe what had just happened. She’d fought it off! It was possible to fight it—it was possible to win! She turned to Grace, who was flushed but smiling.

Mallory’s euphoria crashed like a torn kite. Grace had seen it. She knew Mallory’s repulsive, shameful secret—one that Mallory had been too weak and pathetic to handle herself. She’d seen everything. She wouldn’t sit next to Mallory, wouldn’t want anything to do with her. Oh, God, what if she told other people what had happened?

“I’m sorry.” Mallory was crying before she knew it. “I’m so sorry. I didn’t mean— You shouldn’t— I—”

“Whoa, whoa, it’s okay.” Grace put a hand on her shoulder and led her back to the couch. Mallory sniffed and wiped away tears, her face hot.

“Really, it’s cool,” Grace said. “I’ve got one of those things, too—and mine has tentacles. I know it’s rough.”

“What?” Mallory would have never imagined Grace, with her bright blue hair and effortless confidence, could have her own monster.

“Yeah. They’re easier to deal with when you have someone’s help.” Grace looked at her thoughtfully. “Have you talked to anyone about it?”

Mallory shook her head forcefully.

“Well, think about it. Talking about them makes them weaker. Do you want to…?” Grace waved her hand, indicating they could talk now.

Mallory’s throat tightened just thinking about it. Her body was shaky and weak, and her mind was still reeling from shock. “No. I don’t think I could. I—I need more time. Thanks, though.”

“No problem.” She shrugged. “I’m around if you change your mind, and you should check out some forums online if you don’t want to talk face to face.” She walked over to where her textbook lay on the floor and flipped through the pages. “Let’s answer these last few questions, and then I’ll get out of your hair.”

They finished studying, and Mallory thanked Grace profusely while walking her to the door. Grace waved the whole thing off, and when she was gone, Mallory grabbed a plastic bottle of carpet cleaner to deal with the coffee stain on the floor. Scrubbing with a rag, she thought about what Grace had said about talking to people online. She’d never tried that before. Part of her had been afraid someone would find her search history and discover her secret. The rest of her had feared what she’d find: that she’d confirm there was no getting rid of the monster, or that its attacks would eventually kill her.

Now, though…

Mallory put away the carpet cleaner and grabbed her laptop. She would just find a forum and look tonight. Then, once she’d built up her courage, maybe she would post something herself.

She heard a scuttling in the walls as the monster moved from the closet, probably still licking its wounds. Mallory froze in instinct, hunching over, but then she caught herself and determinedly straightened up. It hadn’t left. Maybe it never would. But it didn’t have to rule her life anymore.

Smiling to herself, she clicked on a link and started reading.