I'll Devote Myself to Protecting the Black Knight!黒騎士様を、誠心誠意お守りします！　男装の従者への主人の愛が止まりません

“Where did you go and leave a person like Lord Hendrick behind, you idiot George!” Hendrick, heir to a frontier marquisate, is the flawless, universally admired “perfect” young lord. The only ones who know his true self are his twin retainers, Roslyn and George, who were raised with him like siblings from childhood. Hendrick’s swordsmanship earns him a direct invitation from Queen Joanna of the Kingdom of Merrill to serve as her personal knight, but only male attendants are allowed to accompany him—so only the older twin, George, is chosen. Roslyn forces herself to accept that their days as an inseparable trio are over. Then, on the very day Hendrick is to take up his post, George disappears, leaving behind only a letter. Roslyn takes George’s place, disguising herself as him and serving as Hendrick’s attendant… but what awaits this cross‑dressing retainer and the master whose overflowing feelings won’t be stopped?