Responses
It's because they're separated in "arcs" each couple has one, once the author thinks they're done with one couple they'll pass to the next. She's done with the (main) first couple (except for some cute extras from time to time), she would have to make at least 4 different comics which would divide the views, popularity...
This is indeed a cute story but author should hv made a separate comic for the 2nd couple (like in Window to Window and Room to Room), i do like the couples but i just feel a bit sorry for the main couple cause seems like they are ignored and forgotten now and 2nd couple get more chapters than them, just saying