Responses
I haven't read the story, but usually if the characters have "sex" they would have the tag of Yaoi and (maybe) shounen ai, if not then it would just be shounen ai. If you refer "sex" as sexual scenes where they don't actually show them doing it but them getting aroused then there is no way knowing unless you read it.
they will on chapters 40 onwards
Anyone who can spoil me please do so . If they do have sex I am just going to drop this.