might need to change that "to master to" to "to master the"
Will you wait for me until then?Erika-chan.Mom will then allow me to practice Tankery.Yes, but I think that, if I can manage to master the gracefulness of a maiden in the Maiden course,But your mom, the instructor, won't allow that, right?You told me I should join the Tankery course, yes?But while you were gone, Erika-chan, I did some thinking.Indeed.There, there...Erika-chan! I was so lonely!This is how I thought you'd act.There's something different about you.Welcome back!!Their promiseAh, Erika-chan!!