Destiny Star Girlfriend 2

Average joe Seiji encounters another magical-girl wonderkid—this time in the form of the mysterious Maja at his neighborhood park! Intrigued by her aloof charm and possible hidden motive, he tries to say something, when a Majin appears out of nowhere to reveal Maja’s true identity—a ruthless warrioress in cahoots with evil in exchange for the darker arts... Stunned, Seiji agrees to serve as Maja’s familiar—her “satellite”—to aid them in taking down another, rival Majin’s demon hordes. He also stands to gain an impressive array of powers, but as a trade-off, he is tightly bound to Maja by a ma(Storyline via IGDB)