poor little kiddo... gotta feel sad for him for completely agreeing like that just to ignite a fire under Usato -.- someone should have reminded him that Rose made him leave the realm of human after 2 weeks.
So much hate for Mina x.O; Using him as a stress relief doll is indeed unforgivable, but being in a system where that is considered acceptable is worse. Remember, in this city if you are a healing mage you are seen as worthless, him even more-so because he can't heal others. Individuals are respected based on magical talent, which is why Halfa, with Mage Sight, was also treated as an abnormal (always went all out when he got to duel students probably so he could take his stress out on them). Right now, Usato is being treated as an "exception to the rule;" he may be a monster healing mage but all other healing mages are still useless. BUT! if after a week of training this kiddo can already gain the abilities to fight back against a notable magic user? Suddenly, every mage there realizes that ANY student, even a useless white mage, can become the strongest, regardless of birth, as long as they put forth the work to do so.