A downloadable game for Windows, macOS, and Linux

We're live on kickstarter! Make sure you support us and play the demo! 


1st Degree is a r18+ (or M) boy's love game in development by Parival, a recently created visual novel development team focused on boy's love visual novels. We're currently seeking a few voice actors. The game will feature 4 routes- Aiden, Jun, Minami, and the twins Griffith and Leo- but, Rei will eventually kill off at least 3 characters. Choose who will live, who will die, and who will end up with Rei!

A city on edge as a serial killer roams the streets...

Frustrated by one unsolved murder after another, forensics graduate student Rei Kuroshima decides to get his hands dirty to solve the crimes. He resolves to copy the killings to chase the serial killer known as "the Doctor" in order to figure out how the murders were accomplished. Although, he begins to develop certain... urges. Along with his supervisor Aiden Steele, a detective oblivious to Rei’s identity as the copycat killer, he must piece together a trail of evidence to uncover the identity of “the Doctor.” At school, however, Rei must also maintain his normal student life while dealing with his desire to kill, leading him to the ultimate choice - Who will he choose to love, and who will he resolve to kill?


Have any questions you'd like to ask the development team? Send us an email! We'd love to hear your comments and questions about the game! Just send us a message at parivalgames@gmail.com

Wanna see early previews AND exclusive CG/Art previews? 

Join our discord! Parival Inc, Public Server!

Other social media:

Twitter: Parival Games @ Twitter

Instagram: Parival Games @ Instagram

Tumblr: Parival Games @ Tumblr

Facebook: Parival Games @ Facebook

More information

Published 118 days ago
StatusIn development
PlatformsWindows, macOS, Linux
Tagsbl, boys-love, bxb, Crime, drama, gay, murder, Mystery, shounen-ai, yaoi

Install instructions

Download the correct archive for your OS and unzip.


FirstDegreeDemo-1.0-win.zip 482 MB
FirstDegreeDemo-1.0-mac.zip 481 MB
FirstDegreeDemo-1.0-linux.tar.bz2 485 MB

Development log

View all posts


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Are you able to host the demo on itch.io itself or something? I tried to download from mega but it keeps freezing early on in the download - 27% and claims that it's downloading at a good speed but the completion rate doesn't move at all even after 2 hours. Initially I had problems trying to even get mega to start downloading so I don't feel too optimistic about being able to try the demo.

We have uploaded new files directly on our page, sorry for the inconvenience. Please let us know if you're having any more troubles downloading the demo!

I keep trying to download the demo, but it's not working. :(

Have you disabled your pop-up blocker? Since the demo is contained in an external link, you will need to disable the blocker in order to get the link to be able to download it. You just have to click on the blocker which appears on the right side of the address bar when you click on the download demo button. Once you click it, you have the option to either click on the link directly or to disable the pop-up blocker for our page. 

Let us know if it works!


Of course. I feel silly, but I'm glad that was the problem. Thanks!