Yamamoto is instinctively insightful and yet clueless about some things, Gokudera is tsundere yet coy. I love how Yamamoto completely understands Gokudera, yet loves him anyway. A highlight for me is a moment when Gokudera reacts to Tsuna and Kyoko together, and Yamamoto notices. The art is beautiful and expressive. Read it if you are an 8059 fan.