Trying to Break the Strings but they keep Tying Tighter

Everyone got their soul ties one day, Kamado Tanjiro was no exception. But with his family now deceased and his younger sister deathly ill and can pass away at any given moment he prioritizes her first. He puts her over everything, most of all himself. And when he goes to Kimetsu Academy for the first time in months his strings seem to get tighter and tighter every time he breathes. No matter how many times he tries to cut them.