These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Ho Yay: The Furo Scene described in the Foe Yay entry. Actually, size comparison seems to be a recurring sub-theme in the series: in episode 18, we see Kazuki and Gouta taking a leak in a river, side by side. Gouta turns to take a peer at Kazuki and immediately thinks that, compared to him, he's an "UNDERDOG!!!" (complete with English text!)
Les Yay: Mahiro seems to like girls, especially Tokiko.
What Do You Mean, It's Not Symbolic?: In episode 2, when Kazuki leaps into the air to dodge the frogs' attack, you get a clear shot of the moon with a strange ring around it. It turns out that that's the alchemical symbol for gold... or also the Sun.