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…?