Season four assumes you never left, and that's exactly the deal you signed up for back in 2013. This is OVA-pace Strike the Blood, dropped in Blu-ray pairs, which means no filler breathing room and no recap hand-holding: it moves like someone adapting light novel chapters with a stopwatch, and if you haven't read them, you will be lost. Fans will tell you straight that the plotting is a knot. They'll also tell you it's worth it, because this is where Kojou finally stops being the reluctant Fourth Primogenitor who apologizes for existing and starts carrying the weight of twelve beast vassals like he means it, while Yukina keeps that spear pointed at him out of duty she stopped believing in ages ago. Threads laid down in Itogami City in the very first season get paid off here. The art holds, the fights land, and the reward is aimed squarely at the people who stayed.
Akatsuki Kojou continues his life as the Fourth Primogenitor in Itogami City, a haven for supernatural beings where humans and monsters coexist in fragile balance. Yukina remains at his side as his observer and companion, her spirit spear ready for any threat that emerges. As tensions between rival factions intensify and ancient powers awaken, Kojou finds himself caught between competing interests seeking to control or destroy him. New adversaries test his limits while the bonds he's formed with Yukina and his allies grow stronger. The series maintains its blend of supernatural action and character-driven moments, balancing intense combat sequences with quieter interactions that reveal the depth beneath the surface conflict. Viewers drawn to vampire mythology with a modern twist, romantic tension woven through dangerous situations, and the clash between hidden worlds and ordinary life will find themselves invested in where Kojou's journey leads next.