Yamamoto knows Tsuna likes Ryohei's sister, Yamamoto would be on board with a plan to get the two of them together. They would make a good couple after all, since anyone who gets close to any of them is bound to be connected to the family and she is already part of said family. Gokudera has the right idea. And the swordsman is going to remain blissfully unaware that the rest of the girls are anything more than friendly.

His run takes him longer than he thought, working through this while his feet dig into sand is cathartic and by the time he and Jiro make it back Gokudera has been turned into a fish. Yamamoto would laugh except he sees how peaceful Gokudera looks and for a moment he just stands there smiling down at the other. When he sees the alien child approaching with shells in his hands the swordsman has to cover his mouth to not life, he searches at his feet, finding one he gets the idea of what the kid wants to do and begins to help him with a finger to his lips. Indicating they should not wake Gokudera up yet.

He is getting something thrown at him for this he can almost bet, but if that mischievous smile of his says anything with its boyish charm, he does not mind.