The "blackmailing/threatening " them because the engagement is fake is
so absurd, whats is up with that ?? I get that the author is trying to implement a way to force them to act like its real but its ridiculous the threatening by anonymous calling XD
This initial premise was interesting but it seems like the plot keeps on going around and around without a real plot or order, as an ordinary SoL. It's not that SoL is bad, but this manga as the main question to solve, and it's not getting there, apparently not soon at all. If feels like Rika is the only one who is thinking that this lie could become a real thing someday, Takuya is the classic cliché single Japanese man, herbivore, awkward, and with no interest in the opposite sex... I feel bad for Rika, the future of this "love story" sounds... interesting ...
Chapter 16, we saw that there are 348 days left to the Siberia departure. With the number of times that deadline was mentioned, it's safe to say that the story likely to go on until the last few days or (last day?) So we are into a 200+ series ??
That being said, I will keep reading hoping for some development soon