Kikkai-kun

[MangaDex]

 

[Jackist]

Wtf are you doing with these wrong tags? Correct them idiots

 

[AndroidLB]

Wtf are you doing with these wrong tags? Correct them idiots

They're correct for the latter half. Nagai is known for perverted and ultraviolent stories, as this is a gag manga, it mixes all kind of elements. Gore is milder with this one compared to Harenchi Gakuen or Abashiri Ikka.