Yabun Ni Kyuuketsu Shitsureishimasu

Vol.1 Chapter 2
Vol.1 Chapter 1
Vol.1 Chapter 3
Vol.1 Chapter 1
Vol.1 Chapter 3
Sayo Minoru is an office worker who has been living an earnest, low-key life. One day, he suddenly becomes a vampire and sucks the blood of his junior colleague, Yamadera, because he can't take it anymore...!+