Is this really yuri? Seems more like futa, though I guess it could also be strap-ons with ejaculation? Don't see any straps, though. Regardless, one of those tags probably belongs here. Take a look at pages 195-202 and 278-290 for the relevant content and decide for yourself, I'm not sure how that's supposed to be tagged.
Does a tai that pumps semen count for futa or for something else then? Because that becomes the deciding factor... 'demon girl', 'tail' and 'tailjob' appear to work, but that's only if it being the armour(?) doesn't make the tail a tentacle instead...?