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A smile is well suited to Tsukasa; not quite like Hinata, Mitsuru or Sora and how they beam and grin, but more regal and polite – and that makes Yuuta feel at ease, even if his heart starts to beat faster. Sometimes, though, he does beam, like when things go according to plan in whatever card game he decides to play that day or when he manages to get his hands on something sweet; Marvelous,he exclaims, but if there's anything marvelous here it has to be Tsukasa himself.
But that isn't all. Sometimes his smiles are a bit more smug, mostly after he finds something nice to say to Tori to get on his nerves – then they start fighting as normal. Sometimes, though, that moment of glory doesn't come, and his smiles are then forced and filled with bloodlust – which he immediately fixes, because he's apparently not like Tori in that aspect, then the argument is reignited.
But sometimes there are no smiles, because like everyone else, there are times when everything can be too much for Tsukasa.
It's not hard to tell, at least; If Yuuta hasn't looked in his direction and noticed how shaky he is, the please excuse me said in a quavering voice that follows is what will get his attention. Once Tsukasa is out of sight, his footsteps tend to quicken, and if Yuuta doesn't pursue him within a moment he'll start crying because it hurts when he can't do anything to help at all.
The crackling of candy wrappers and whatever his brother uses to package sweets is what gives him away, but there's no need to excitedly yell about finding Tsukasa. Rather, a softer approach is what works best. So even if Tsukasa starts crying at the mention of his name this time around, Yuuta will still push away the wrappers very gently as though something will break if he doesn't, and sit beside him, willing to listen to anything that troubles him. Even if his shoulder ends up wet with tears, even if he has no idea what to say, he still does his absolute best to reassure him that everything will be just fine.
(For some reason, he ends up expressing how much he loves him every single time.)
The last sniffle is how Yuuta knows that Tsukasa won't be overwhelmed if he decides to put his own headphones on him. The songs he picks out for him to listen to are slow-paced to keep the now serene atmosphere, but rarely do they not turn out romantic – it's not even coincidental anymore, and Tsukasa has definitely caught on.
Because sometimes Tsukasa will smile lovingly, cheeks rosy and fingers entwined with his, and this happens to be one of them.