I think they were still available in December 2019, but now in March 2020 i can't find any trace of the game on Fakku.

What are realistic chances of the sequel/expansion (?) coming over in English?

I have completed all the lines, and unlock 9 achievements. But I can't find way to unlock these two. Get Nagi to Like You (Nagi appears to like you now. ) Maitetsu Expert (You can now call yourself the Maitetsu Expert. )

Waiting for it since the release date

How much will it cost? $20? $40? Also, will there be steam trading cards for this game?