Well I don't blame wakaba snapping at little sister, she is getting throught all that guilt (deserved of course), and the first thing little sister do is blame the guy.
It makes me mad that the girl that confess will get rejected and the girl who won’t just wait for the guy to confess and win without doing nothing... I love komi but it is unfair.
I just notice this but she is thick... nice...
Wohoo for the kiss!, I'm afraid there will be a misunderstanding from her running away in the next chapter.