Kobato manga help ;-;

My brother really likes Kobato and so i want to help him find the link to the manga and prequal manga that apparently exists. I still havent finished the anime but i really want to help him find this so if theres anyone who knows a link to it please share! Even if its not translated i can try my best to do a screen translation of it for him, i just want to be able to give him the experience of reading it.