He knew because his boss was the last person he talked to before Minato went up and disappeared to sulk. If it was Shizuka who was “smiling” and Minato wasnt comfortable with it, then he would have told Minato. It’s not Shizuka’s fault Minato has issues because of his parents so he should stop projecting them to Shizuka.
Lmao the people downvoting and everyone saying that Minato’s actions are justifiable are the kind of people that take no accountability in life and then turn around and wonder why people are distancing themselves from them. Because wtf? I’m sorry but Shizumi has feelings too, Minato can’t expect to always be a lil damsel in distress and Shizumi having to figure out wtf is wrong with him this time.

Well I mean Shizuka’s not a mind reader, all he did was smile at someone. The least Minato could do was tell him he’s uncomfortable with that. And Shizuka being Shizuka Im sure he’ll put a stop with it. This thing Minato’s doing is just frustrating. Boi needs to go to therapy to sort out his issues