Servamp manga volume 13 features story and art Strike Tanaka.

Kuro, the Servamp of Sloth vampire who does nothing but complain about what a pain in the ass everything is, and his Eve, Shirota Mahiru, are still trying to help Tsurugi. To do this, they must take on Toma, the Big Bad, in the mental world. Meanwhile, Tsuyuki and Iduna’s battle is quickly spiraling towards its conclusion. This heart-racing story is about to reach an unexpected climax!!