This one is a weird one. I really like characters and art is reeeeeally good and not typical for modern stuff but the plot just went in a weird direction. It almost looks like the author didn't know or want to continue main plot and start to write something completely different.
Started reading because having the word "marriage" in the title, it must surely mean we're in for some feel-good married life manga. I'm starting to get the vibe that any possible marriage will be the final chapter, if at all.