Resist Extra Dimensional

R.E.D is a fantasy visual novel where you play as Agent No. 01 of an interdimensional defense organization tasked with protecting civilians from otherworldly creatures and alternate-realm threats. The game blends modern military elements with fantasy worldbuilding centered on dimensional gates and monsters. Your cover assignment places you undercover as a student at R.E.D's academy, where you encounter a cast of unique heroines. Your choices throughout the narrative determine which characters remain loyal to you, with multiple relationship outcomes including a harem ending.