@starlightcitypro it depends from the country, if this manga had taken place in Italy, Austria, Hungary, Portugal and Germany (where the age of consent is 14, while in the rest of Europe is 16) it would still be legal as pedophilia is anyway considered everywhere only from below the age of 10/13.
Still, it's pretty dumb to call this pedophilia since she is 17 years old being at the second year of high school (japanese attend high school from 16 to 18) and I don't think that when she turns 18 she will magically become a completely different person. She is just as much of an adult as he is, even though they are both fucked up in their own way.