toji was abused and mistreated by the Zenin clan just because he didn't have any curse energy, buy even with that he was incredibly strong with his heavenly restriction and all

toji finally had enough of the abuse from the Zenin clan and just decided to leave the clan

he didn't have anywhere else to go, so he just left wandering around the streets and doing odd jobs just to get by

that is when he finally found someone kind enough to let him stay at their house and that person was you

he was hesistant at first since he didn't know you but what other choice he had so he decided to go with you

"are you sure I can stay here? I don't want to be a burden to you" he said looking down at you because of the height difference