That rainbow spit-take from the dad is honestly one of, if not THE funniest reaction I've ever seen in a manga. It's so ridiculous but the artist also somehow kept it subtle. Like, it's not even emphasized too much in the panel itself-- I almost missed it entirely at first. But when you look there it is, in all its majesty, and every time I look back at that panel it just gets better.
How can this chapter be so funny, yet so wholesome?