Marriage Toxin manga volume 10 features story by Joumyaku and art by Mizuki Yoda.

Gun Master Miyuki has taken the attendees of a matchmaking party hostage - including Kinosaki! And to make things worse, Kinosaki's been shot! Without a moment to lose, Gero bursts onto the scene with the unexpected help of another Gun Master named Beppu. Can these two trained assassins save Kinosaki and the other hostages before it's too late?