AT LAST!!!!!!! I HAVE FINALLY FOUND IT!!!!!! I HAVE BEEN SEARCHING FOR THIS EVER SINCE I HAD READ THIS WHEN I WAS ABOUT 13-15 YEARS OLD!!!!!! (....currently 22) BUT I ALWAYS TOLD MYSELF THAT IT WOULD POP UP WHEN THE TIME WAS RIGHT AND NOW IT IS!!!! I LOVE THE CONCEPT OF THIS PLOT!!!! IT WAS SO DYNAMIC AND NEW TO ME WHEN I FIRST READ IT!!! AND I HAVEN'T FOUND A SIMILAR MANGA THAT IS LIKE THIS!!!!! IT'S ONE OF A KIND!!!!
I started reading it...cracked myself up just watching this dude turn into a Vampire XD Great plot but not my cup of tea. A boy tries to save his twin sister by injecting himself with a retrovirus to cure her and turns into a virus-sucking vampire.
Edit:
I also look forward to the next updates.