SHUKUFUKU NO KURO TO HAMETSU NO SHIRO: DRAGON KISHIDAN II

Proper Japanese Title: 祝福の黒と破滅の白 ドラゴン騎士団II Originally serialized in Wings. — Description from Comic Vine community (comicvine.gamespot.com · https://comicvine.gamespot.com/shukufuku-no-kuro-to-hametsu-no-shiro-dragon-kishi/4050-108420/).