I think it's more because Hime (Makoto) had only ever loved Arata's past self which he thought was a girl. Hence why Hime was so hesitant at first when he found out that Arata was actually a guy. Hime wasnt really straight nor was he gay or bi. He had only ever loved one person so I feel he's more pan or maybe even demi? I think Arata said it in a way that implied that Hime had finally accepted him and was working hard towards improving himself for the sake of their relationship (but then again that's just how I interpreted it so I could be way off the mark ╮(￣▽￣)╭ )
Yeah, that makes sense. Still that comment is super disorienting considering the fact that they were just after sex when he made it lmao
Honestly though lol
"He's not even gay or bi".... What? Why would a straight guy date another guy? Unless he's implying Hime is some other sexuality that isn't mentioned here, but this is yaoi so I doubt that lmao