Read the translator credit, they said they will
So why it's marked complete?
idk but they said they will so they will
I guess because the main story itself already done
Other mangas main story are done as well except for some extras and is marked incomplete still.
Will wait for it then :3
They not gonna translate the extras? >_<
http://www.mangago.zone/read-manga/akuma_chan_wa_momoiro/raw/iur_chapter-1/pg-157/