It matters.

[Because you didn't expect that comment to just slide by Tenka, did you? That much is something that he keeps his voice steady on, absolute and not really leaving a lot of room for argument. Of course it matters if Shirasu breaks a promise to Tenka - especially one about Sousei. Regardless of anything that happened before, Sousei matters to Tenka now.]

If he breaks his promise - [if he lays an offending hand on Sousei] - there will be consequences.

[ . . . as for his other assurances, Tenka just sighs in response to that. At least his brothers have ten years of memories on their side as well as the fact that they're honestly just really likable kids. Tenka's still not sure what happened between them and Shirasu but that just cements the idea further that-]

I'll let Soramaru decide if he wants to keep talking to Shirasu. That's his choice to make, not mine.

[A breath.]

I told Shirasu that if he lets any more harm come to them.... that's it.

[It's vague but it's the most that Tenka can say regarding the subject - because somewhere in his heart, it's still unreal to him that he could be talking about breaking off ties with Shirasu of all people.

But that's what he'd do if something happened to Soramaru or Chuutarou again.]