Why she had to trip tho? The author really has something against blonde girls i reckon.
Well, for starters the whole mess happened since Sakura doesnt open it to anyone. If Waka knew she wouldnt had innocently spoiled valentines.
Nonethless, things kind worked out fine and we finally saw some reaction from Kuzumi side.
But its really odd how perceptive Kuzumi is while still being completely clueless the majority of the time. I get is the plot, but then dont let him be seem as perceptive never lol.