This is not "pornographic".
First thing first the magazine inwhich this is serialized is "young champion retsu". That yes, it published a lot of sexy stuff, but nothing explicitly "hentai", and many safe series like voynich hotel.
Also despite many sexual scenes, sex is not the main focus and is not depicted so explicitly. The censorship is much heavier than just black bars or pixelation and there is no entire pages dedicated to close ups of the penetration.
But there is many people that call fire force an hentai manga, so... not surprising.