TheBandai Visual website now has chapter 45 of the Sora no Kiseki manga. This chapter includes Estelle and Joshua going after Grancel Castle, as it builds up to the exciting conclusion of First Chapter.
As of this point, it’s still unknown whether or not Shinki Kitsutsuki will continue the manga onward to the story of Second Chapter.
This chapter will be live on the site and free until the next chapter is uploaded, which will be on 9/2/2013.