Of all the things to stretch my suspension of disbelief in a manga... it's that an entire family, including the child, forgets a 9-year-old's birthday (well, I guess 10-year-old now).
I have yet to see a panel in this manga where Yui is not cute despite any emotional or physical state she's drawn in.
The bottom right of page 6 might be a new favorite.
Since My Senpai is Tiny and Cute is getting an anime, I was wondering whether A Happy Couple had anything new. Is this one dead in favor of My Senpai is Tiny and Cute...?