Silent Witch Novel Volume 4.5 -after- was written by Matsuri Isora with illustrations from Nanna Fujimi.

The school festival may be over, but there's no time to relax as a series of mysterious happenings takes Serendia Academy by storm. As winter break approaches, food begins to disappear, a lost girl turns up at school, students start seeing ghostly balls of fire, and the second prince gets wrapped up in a suspicious spell. It's unclear how much danger they're in, but Detective Monica and her mystery-loving partner Nero are determined to get to the bottom of whatever's going on-better safe than sorry, as they say!

Secrets of the Silent Witch Novel Volume 5 was written by Matsuri Isora with illustrations from Nanna Fujimi.

Winter vacation has finally arrived, and Monica is looking forward to a break from protecting the second prince. But her plans quickly fall apart when she is ordered to guard him once again—this time in her official capacity as the Silent Witch! Now she must escort Felix on a diplomatic mission to a neighboring country without him realizing she and Monica Norton are one and the same. Can she pull through, or will her body give out from the stress? And what new threat lies in wait for the prince at their destination…?

Secrets of the Silent Witch Novel Volume 6 was written by Matsuri Isora with illustrations from Nanna Fujimi.

Monica suspects Duke Clockford is somehow involved in the incident with the curse dragon, but she doesn't have solid evidence. With her left arm still suffering the aftereffects of the curse and her heart full of doubt about the second prince, she begins her second semester at Serendia. However, now the prince is on the lookout for someone with a wounded left arm, and there's a new transfer student at the academy—a notorious troublemaker from Minerva's who knows Monica's true identity. Meanwhile, the Starseer Witch warns that the Seven Sages will soon be down to six—could this ominous prediction have anything to do with Monica's troubles?