The Seme was undoubtedly flustered and thoroughly embarrassed by the fact that his brother came into the store and then proceeded to unintentionally lay all the facts of their relation to each other and about how he knew Hinata, some what, from the past. Basically he was trying to build a rapport with Hinata and they were doing well until the brother kind of fastforwarded his plans. I get it but that would definitely hurt hearing the person you like say that. Other than that they talked it out in the park. Seme clearly likes Hinata so much he now works with him.
The Seme was undoubtedly flustered and thoroughly embarrassed by the fact that his brother came into the store and then proceeded to unintentionally lay all the facts of their relation to each other and about how he knew Hinata, some what, from the past. Basically he was trying to build a rapport with Hinata and they were doing well until the brother kind of fastforwarded his plans. I get it but that would definitely hurt hearing the person you like say that. Other than that they talked it out in the park. Seme clearly likes Hinata so much he now works with him.