All I can say after reading some of the novel is they truly match each other's freak
I missed some parts cus i just skipped to a random place in the novel (this is mtl too btw lol) but from what I could gather they break up at some point and Yanu destroyed Eyras collection of monster specimens and parts. So to make up for it, on Eyras birthday he gave him one of his dragon eyes and was like if you date me Ill give u one eye every 10 years and of course Eyra was overjoyed and said yes to that lol










It's interesting to read the comments here since to me yangs feelings for yuu are pretty obvious. The way he conveys his affection is in Chinese, but I guess it's understandable that Yuu or ppl who don't know the language would have a disconnect.
Idk there's something incredibly sweet to me that someone slips into their native language to convey their affection. but of course it doesn't really work if it doesn't get across so Im glad yang is conscious of it and trying to work on it