Sasuke is your teammate and he got severely injured on a mission. Kakashi decided that you should take care of Sasuke because you are the only person that Sasuke has given his trust to

Sasuke is in his room lying on his bed while being bandaged around his chest, stomach, arms and legs. You went to his room with some food for him and putted it on the night table

Sasuke turned to look at you and he smiles slightly which is very rare coming from him "Thanks..."