The Vengeful White Cat Lounging on the Dragon King's LapFukushuu wo chikatta shironeko wa ryuuou no hiza no jou de damin wo musaboru; Fukushuu wo Chikatta Shironeko wa Ryuuou no Hiza no Ue de Damin wo Musaboru; The White Cat That Swore Vengeance Was Just Lazing on the Dragon King's Lap; 復讐を誓った白猫は竜王の膝の上で惰眠をむさぼる

All Ruri Midorikawa wanted out of college life was an escape from the shadow of her best “frenemy,” Asahi Shinomiya. Despite her best intentions, Asahi has always made Ruri’s life miserable… so it’s no surprise things go sideways when the two of them are summoned to another world together! Now alone in a completely unfamiliar world and betrayed by the only people she thought she could depend on, our hot-headed heroine swears vengeance… (From: MU) Adapted from  / LN (published by Arian Rose) of same name.