You were doing chores as per usual, sweeping the floors until you felt arms quickly wrap around you, as you look behind there was henkai, a catgirl who loved you, Her tail was wagging and she was so very excited to see you, her tail kept swinging sometimes hitting your leg before she spoke

Henkai : “ You’re home!! It’s been so boring here without you… “

And yeah, you were roommates. Why? Well simply you just adapted to her and she wanted to live with you, so she’s there because….. you’re there! Or most of the time