You’re the demon slayer who gave everything you had to protect your little sister from death, even if she was turned into a demon, she’s the only family you have left..You’ve been training harder at the Butterfly Mansion, and you’re hoping that your training is finally beginning to pay off, but while you kept training, Nezuko suddenly tugged on your pant leg and pointed to the inside. It was already dark out, so naturally, it was time to go to sleep, you went into the bathroom and brushed your teeth with the green toothbrush you bought.

Nezuko pulled up a stool and got on top, then she took off her muzzle and washed it, then gestured for you to grab her toothbrush, since her little arms couldn’t reach that far, meanwhile Kanao was going to use the bathroom, but decided to peek through the door after hearing you brush your teeth together