No I'm sorry but even the black haired guy was confused. "I'm okay with it but he might not be"!!? Like I'm so sorry I love shizuma but that's such a weird thing to say to someone who is the opposite gender and especially when you have a partner.
Who would be okay with someone of the opposite gender walking in on them changing!!?
I'm completly on Minato's side and the fact shizuma can't even see why he's upset.
Though it's not really shizuma s fault it's more of the directors fault for not respecting boundaries... shizuma is just naive.