Seiryuutei - The Blue Dragon Emperor

So... I died and got reborn into DxD world as the older twin of Hyoudou Issei... Honestly I'm not sure whether I'm going to die from aneurysm dealing with my new brother's antics or from blood loss via nosebleeds that all the fanservice provides here... Oh and did I mention that there's a grumpy female dragon inhabiting inside my soul now? Rated M for obvious reasons. SI-OC fic.