My tenant's bf gaslighted her for a MONTH so she'd move in with him

okay so I wasn't going to post this but it genuinely haunts me.

10 years ago my family ran a small studio apartment building in Sinchon. Pretty secure setup, parents from outside Seoul would literally BEG us to take their daughters in even at higher rent. So the building was like 80% women.

About 3 months in, one tenant starts asking us to change her door lock password. Multiple times a month. The manual's right there but she kept having us do it anyway. Annoying, but okay, whatever, we just smiled and did it.

Then she starts saying stuff like "someone's been in my room when I'm gone."

Now look. We had a master key card. But we're not psycho landlords who just wander into people's rooms. Only time we'd ever use it was if someone moved out without telling us the code, or for scheduled electrical checks (with notice). That's IT.

But she clearly suspected me. And of course this was during summer break so I was basically the only one managing the building. My parents tried to calm her down, told her she was imagining things, sent her home.

Then one day she comes STORMING back up. Said she left a piece of paper in her door frame before going out, and folded the corner of her blanket a specific way. Paper was on the floor. Blanket was unfolded.

She did not ask. She did not wonder. She just walked up to me screaming and cursing me out while I was sitting there eating a katsu cutlet after sweating through roof cleanup all day.

At this point even my parents were starting to look at me weird.

We only had 2 CCTVs, one at the entrance, one at the parking lot. Nothing on the floors. I couldn't afford to install more just to catch one girl's "paranoia," so I disguised my digital camera in a Vita500 box and set it up in her hallway. Had to sneak down every 2 hours to clear the memory card. Did this for 3 days before I was like okay I literally cannot keep doing this.

Day 4. A knock at our door.

Not the girl. The police.

I go look at her room and the walls are COVERED in shimmer. Like cosmetic pearl powder, the kind in eyeshadow. Turns out before she went back to her hometown for a few days, she smeared her makeup glitter on her door handle as a trap. If someone came in, they'd track it back to their own room.

Instead, whoever broke in took the pearl powder and rubbed it on EVERY SURFACE. Walls. Ceiling. Floor. All of it. Like they were mocking her.

Police searched my room. Keyboard, mouse, drawer handles, faucets, even the toilet flush lever. Checked everything.

Nothing. Obviously.

I get dragged to the station anyway as a "witness." I'm a young guy so clearly I'm suspicious (spoiler: I was eating katsu and cleaning a roof, I am begging you).

When I got home I finally looked through the camera footage I'd collected.

Night 2. Around 11pm. Her boyfriend walks into her empty apartment.

Day 3 footage: nothing. Day 4: camera was already down.

I went straight back to the police.

Here's what actually happened. The boyfriend had been sneaking into her room for A MONTH while she was at class, leaving just enough off-detail traces to make her feel like someone was watching her. Then whenever she got scared and told him, he'd feed her creepy stories about murders in studio apartments. "Oh you're scared? you can just sleep over at my place tonight."

His endgame was getting her to move in with him.

The day the pearl powder incident blew up? That was supposed to be the CLIMAX. She'd be so terrified she'd finally agree to live with him.

And when the police showed up that day, this guy was literally THERE holding her, being all soft and comforting while she cried.

The entire time. The entire time he was the one doing it and he just stood there hugging her.

He got sued. She took a leave of absence from school.