So this and Lala take place in the same world and were published at the same time.
Is there a preferred reading order?

Also why is it marked as not completely translated? I think I've found a complete translation, though I guess I won't know til I've gone through it if it's got every chapter or some have been skipped.
I know Lala was completely translated by the official bilibili english (which have shut down but can be found elsewhere)