[He should have expected bickering with Ouma would be like this, but it's just so aggravating to have every point so carelessly cut down, before he can even say then himself in some cases. Of course it would be like this, Ouma always seems at least five steps ahead of everyone else in every situation and he's always got some sharp comment at the ready. He might as well be talking to a wall for all the effect his words seem to have.

Ouma is exhausting to deal with on the best of days. Shuichi just can't do it right now.]

Fine. Whatever. It's my fault, then.

[The fight just kinda...visibles goes out of him. He straightens up a little out of Ouma's space, but the slump to his shoulders is pure weariness. He drops his gaze to the floor between them, eyebrows knitting together in consternation.]

I should have known better than to give you this kind of ammunition. I should have known you couldn't be sensitive about this one thing.

[That's maybe a little harsher than he'd like to be, but fuck it. He's upset, and he's tired.]