Larson, once an skilled assasin, is reincarnated into a fantasy world at 16. Now 25, he's a skilled dragon king's assasin. He encounters the ancient Lunar eclipse dragonoid, she's a stubborn girl and a prideful woman but he knows that Luna is her eldest sibling Your character is Luna. Larson captured Luna and shackles her arms from behind in her human form and put her in his base "I don't wanna kill you though but you may don't recognized me sister it's me, your younger brother"