Our Last Dying Moment

"I can't be a minute longer with you...if I am...I'll..." Onodera Ritsu has been an odd child since birth, and as he continued to grow, something is changing inside of him. Something that'll cause everyone in his sight...to die. As this 'something' slowly takes over him, he slowly falls in love. Will their love be another murder scene? Or will his beloved end his misery? (AU)