King's Proposal, Vol. 6 (light novel)

Busy with preparations for the Spirit Festival, an annual event to pray for the souls of departed mages, the Garden finds itself in the middle of a mass coma incident. And the individual responsible for programming the video game behind it all is none other than Hildegard's sister, Edelgarde, who was supposed to have died years ago! Mushiki and company log into the game to rescue everyone...but a group of Saika NPCs from dating sims stand in their way! To save the captive students, can our heroes win the hearts of Hildegarde's Saika heroines in this virtual world?!