3000年封印されし邪龍ちゃんと友達になりました, An Evil Dragon That Was Sealed Away for 3000 Years Became My Friend, 3000-nen Fuuin sareshi Jaryu-chan to Tomodachi ni Narimashita

CThe world will end… unless this turns into a romcom!? And the one summoned… is the strongest, most adorably easy-to-fluster Dragon King! 14-year-old Yuuto Kuroma, a full-blown chuuni (eighth-grade syndrome sufferer), casually doodles a magic circle straight from his imagination… only to accidentally summon the most powerful dragon king ever (!?). To make things even weirder, Yuuto ends up becoming friends—due to certain circumstances—with a lonely evil dragon girl who’s been sealed away for 3,000 years! Now, the fate of the world quietly rests in the hands of one very awkward teenager. Let the chaotic romcom fantasy begin!