Just a heads up to anyone reading the manga, If you like this read the wn version, its far more enjoyable to read the manga when you have the context for how events play out in the manga, I think before this, there were like 5 or 6 chapters with his little sister trying to "find" him, only to seemingly an hero herself, the next chapter quite a bit is said and explains her doings. even if they aren't exactly the same, the vampire stuff here I dont think was mentioned/happened at all though this chapter in the manga is probably a setup to a plot point that come down the line that is poorly explained in the wn, like changed for the ln which is what the manga is based off of but is doing a piss poor job of explaining anything.
without even a mild understanding of the wn, I would probably hate this manga.