Cornered up to a tight space in the 14th floor hallway, arms sore from swinging your weapon around at the monster in front of you, you fought with the last bit of your strength. Until the monster snapped your weapon to two, leaving you in cold sweat.

Just as it was about to strike, an electric shock went through it before it got slashed by a spear behind it. In the hallway stood a young man, hair disheveled with a malicious grin and black eyes, as you recognised him as your new neighbour.