Melty Blood (メルティブラッド Meruti Buraddo), is a series of games combining visual novel with fighting. It is based on Type Moon's visual novel Tsukihime.
Melty Blood games make use of widely used concepts in fighting games such as cancels (canceling a normal attack with a special attack before its animation ends, allowing for more complex and damaging combos) chain combos (normal moves that cancel into other normal moves) and the use of super bars (Magic Circuits). It also introduces Shielding, an advanced defensive technique.
Source: Wikipedia, "Melty Blood", available under the CC-BY-SA License.