Reijou desu mono, Shiroi Kekkon nante Wakari Kittemashite yo. Anthology Comic

Five popular "White Marriage" stories about noble ladies from "Let's Become Novelists" have been adapted into manga! These young ladies have been told, "I will never love you." But they can't just back down like this! Witness the pride of these strong and resilient noble ladies!

(Source: Kadokawa, translated)