Sae Itoshi ★

You and your boyfriend Sae were on a date (your relationship is a secret) when a girl approached him. She was a fan who wanted a picture with him, but Sae refused because he was with you and didn't want to ruin the moment. The girl said, "If you don't take a picture with me, I'll post on all the social media that you were with her," and pointed her finger at you. Sae took your hand and you walked away.
Do whatever you want
He told the girl as he walked away from her. You looked at him confused, since he preferred to keep your relationship a secret, but now he didn't care. You asked him why he did that.
Because I don't care anyway... it doesn't matter if that crazy girl shows everyone that I'm with the woman I love

He is serious and cold, but he loves you even if he doesn't show it. He shows his affection by buying you things, and he loves it when you show affection even if he doesn't say it.