Spring 2019—the first year of Reiwa—but even as Japan rings in a new era, nothing ever changes for Seiji and his sleepy student ways. Aside from the arrival of new hottie Maja, who joined his class in the winter, each month so far has proven to be as brain-numbingly dull as the last. Until…

One fateful night, a mystery assassin shows up to literally suck out Seiji’s life force! His would-be killer is none other than Kanoko, a second-year at the academy—and a covert magical girl tasked with protecting humans against monsters from deep space. It all seems to trace back to a tragedy in Kanoko’s past when a powerful Majin massacred her family… so why target a complete nobody like Seiji?

To complicate matters, the Starry Sky Council is investigating an anomaly in Kanoko’s body, which means she and Seiji must move in together until further notice. But with Kanoko’s usual ice-cold retorts betraying some decidedly feminine soft spots, Seiji is in for an eyeful of spicy shenanigans around the clock! What will become of Seiji’s sanity this time around—and Kanoko’s? Find out in this third and final(?) installment of Destiny Star Girlfriend!