Leave me alone. We all have our preferences, some people like tsundere girls etc., I just happen to like younger boy protagonists, or specifically the innocent/honest type. And I say 'young' but that could range from young boy...
This list includes only action, horror, thriller, sci fi and suspense animes. These animes have mild/ least amount of nudity scenes and sexual contents. Some of these animes do not have any sexual contents at all.