Responses
You don't exactly control emotions, it wasn't crazy to make the assumption at all.It's not as if he started yelling or caused a scene. And he asked for a clarification which was dodged, further proving his assumptions. This isn't on him, it's on Shuraka. If Shuraka didn't dodge the question, it would be resolved. Tei clearly asked.

Dude can we please start using our words?? All he had to do was ask instead of assuming shuraka slept with the pink haired dude. I sure hope he didn’t… but it’s so early for this miscommunication