Mystery anime focus on unresolved questions, and the efforts of characters to discover the answers to them. Whether curious and deadly events are afoot, or some part of the world itself is strange or inexplicable, or someone's past or identity seems strangely shrouded, these characters are set on learning the truth.
Shounen (少年), translated as "young boy", is a demographic aimed at boys and young men, from elementary school age to around the age of 15. Shounen is the counterpart of Shoujo, a demographic aimed at teenage girls.
Slice of life, or "nichijou" in Japanese, refers to events that occur on a daily basis such as getting ready for the day, light chores, enjoying a hobby, or preparing meals. These events differ depending on setting, but above all else are considered to be ordinary, everyday actions that don’t always follow a central plot. The related tags School Life and Work Life focus on ordinary events that take place in a school or work setting, respectively.