Oh my sweet Goddess, they are ADORABLE. Beats the heck out of your typical dating romcom (as Hata shrewdly points out with that first page...)
For the awkward people in the audience- remember, they may be married, but they've still only known one another for, what, a month on the outside? They had no dating phase, no living-together-before-the-act phase, they just straight up jumped to the marriage. Add to that the fact that they're both a) still pretty immature (I'd say young, but...) b) traditional and c) shy, and it's perfectly normal that they haven't gotten down and dirty yet. It'll happen eventually, chill.