Chi wo Suu no ga Meccha Heta na Kyuuketsuki

A story of a vampire, Ishikawa Runa, who is very bad at sucking blood, and her friends who look out for her.
Note: Chapter 1 was published as a special one-shot in Young Dragon Age under the title Kyuuketsu Hetappi Vampire (吸血へたっぴヴァンパイア).