What PC Visual Novel Games Mix Mystery Investigation With Romance?

I transmigrated into a dating-sim otome game where I was supposed to romance a soft, fragile male lead. I had finally pushed him onto the bed and was just about to make my move when the long-missing system finally popped back online. [Host, I sent you to the wrong game. This is a horror game.] [The man you’re bullying right now is the horror game final boss.] I lifted my head and met a pair of blood-red eyes staring straight at me. My smile froze. “Um… you look a little tired. Maybe we should… continue this another day?” He smiled back, calm and terrifying. “I’m not tired. Go on.”

A series of past murders catch the attention of the police and the media. All the people who were killed were women, all of which had some sort of relationship with a well known and successful businessman named Asriel Parker. For some reason, the murders all point to him as the number one suspect and connection between them. The reasonable thing to do is to put him behind bars but there is one problem. "Everyone is innocent in the eyes of the law until proven guilty." There isn't a shred of evidence that actually pinpoints Asriel Parker as the culprit. With that statement in mind, Selena March, a good police officer and detective is sent undercover as his live-in Personal Assistant to dig up whatever information she can use to put the murderer behind bars. Selena has no idea what she signs up for but she knows for a fact that falling in love is not part of the whole 'undercover' mission

I am a doctor. One day, I come across a weird patient when I am on duty. The first thing she says when she sees me isn't that she feels unwell somewhere. Instead, she says something hair-raising. "Dr. Cantrell, your girlfriend is a murderer." "What nonsense are you spouting?" I shoot back with widened eyes and shoot up from my chair. I feel offended. She calmly says, "She won't be home tonight because she needs to deal with the body. You will know whether what I say is true by tonight."

I had a perception disorder that messed with how I saw and felt stuff. So when I got dropped into a horror game, everyone else freaked out trying to survive— Me? I thought I was in a dating sim. I raised a young fae like she was my kid, fell for the vampire count, and treated the undead like my in-laws. The first time I saw the vampire—face torn up, soaked in blood—I straight-up blushed. "You're really handsome." He froze. Then, low and uncertain: "Am I... really handsome?"

After entering a horror game, I, Anastasia Moreau, begin dating the big boss. At our first meeting, I wrap my arms around his sleek, serpentine body and squeeze him into a corner of the coffin. "Move over, move over." In the next instant, a strikingly handsome young man with white hair and golden eyes appears beneath me. The tips of his ears flush red as he glares at me. "You… You're lying on my hair!" he grits out.

Her life was full of misery and pain until she found out about her mysterious lover on the day of her thirteenth birthday. That person started to take care of her from a distance. What would happen when she finds out her true identity? What would happen when she gets separated from that mysterious lover?