MC may be gay but in denial. Like I can believe it.
The brother & Toujo are following a pretty tropey plot but we're seeing it from the sidelines. So it's no to bad & the MCs involvement makes it better. And I'm not sure it Toujos live rival is gay, bi, or gay for you to the brother. I've received zero confirmation for any of them.
I'm at chapter 49.
Zettai BL ni Naru Sekai VS Zettai BL ni Naritakunai Otoko