Destiny Star Girlfriend 2

Seiji's complicated life takes another turn when he encounters the mysterious Maja at his neighborhood park — and a Majin that appears without warning immediately reveals Maja's actual identity: she is a ruthless magical-girl warrioress who has allied with darkness in exchange for access to the darker arts. Stunned, Seiji agrees to serve as her familiar — her satellite — gaining an array of new powers in exchange for being magically tethered to Maja around the clock, because the tether is what keeps his satellite body functional in the mortal realm. Forced cohabitation with the lovely Maja begins immediately. Her guard, inexplicably, stays completely down around him at all times. Whether an unlikely summer arrangement becomes something more is the question the whole story is building toward.