Toki no Akuma to Mitsu no Monogatari

"I'm not going to shed a tear before I reunite with Laki." She witnesses Laki, who has a marriage engagement with her departures into the outside land. What awaits Ilk is a cruel fate and the "Time Demon". Given the opportunity to receive the "Sands of Time" from the demon which allows her to time travel, her final decision is...... Because of encountering the "Time Demon", three pairs of boys and girls must face their diverging destiny. A "time travel" interweaving formal fantasy tale.

(Source: Back cover of the novel)