Are the missing chapters somewhere else or has nobody translated them yet and this group translated later chapters because they liked them in particular?
I didn't pick up this manga at first because I thought it was going to be your usualy generic edgy and boring mahou "shoujo" story. It's actually surprisingly pure and sweet instead, pretty good stuff.
The artstyle of this artist is nice but the plot is annoyingly deep as a puddle every time to the point it feels for teens who just discovered manga, not a seinen