It seems that Safi was captured and firmly attached to a huge machine! She's hardly knowledgeable on strange mechanical beings like these... As Safi's whole body is fitted with strange devices, the machine sucks and stimulates her sensitive areas, making her arousal rising higher and higher... As soon as it brings her to a forceful orgasm, the machine quickly drains her of every last bit of mana, surging with energy as it charges up its artillery, ready to carry out its next commands...
It's so wonderful when people are trapped in machines~ In Pixiv, it's called something like 'installation of living body parts'/ 生体ユニット or intercourse with machinery/機械姦 . I need to draw more sometime >u<