Guys, I'm confused

I've been meaning to read "An Uncomfortable Truth", "Unstoppable Siblings" and "My Student Can't Be a Psychopath" for a long time but there's a problem... I read manga not only in English but also in Russian (well, I'm Russian after all) and I noticed that these comics are labeled differently in my native language. "An Uncomfortable Truth" is labelled as BL and both "Unstoppable Siblings" and "My Student Can't Be a Psychopath" are labeled as BL and Gl. I'm kind of confused since all these stories are NOT labeled as BL/Gl in English.
Is the protagonist from "An Uncomfortable Truth" in love with his brother? Or is he just admiring him in a brotherly way? Are there any gay/bisexual characters in "Unstoppable Siblings" and "My Student Can't Be a Psychopath"?

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