Giving Him Her Everything (Markiplier x Neko Sister!Pie)

Mark and Felix are in highschool, along with all their YouTube friends. Nekos have become very numerous, so they are also being put into the schools.
Felix is the most popular guy in school. He makes good grades, is the captain of the football team, and is the king of YouTube.

Mark, however, is popular, but not as much as Felix. He makes good grades, is the captain of the swim team, and is a little under Felix on YouTube. Almost every girl falls for him. He's more of a wallflower at times, and a loud, obnoxious gamer at others.
He notices one day, something suspicious about Felix's little Neko sister, Rose, who is a grade under them.

They only figured out about Rose the year before. But, Mark finds out one day that Felix hasn't been watching out for his sister and catches on to something that could be a serious problem. Nekos have been bullied a lot at their school, but this was different. He knows he needs to confront Felix, but is unsure.

Mark lets it slide for a while, until he finally sees what someone is doing to Rose. He gets proof and goes to confront Felix, hoping that this gets resolved.

But then he starts to think... Does he love Rose? He begins to remember everything about her. How his heart raced when he first met her, her adorable ears and tail...
But how would he be able to explain that to one of his best friends? Especially with her being a Neko?

Felix and Mark had been friends since the first grade. He didn't want to ruin that. But then again, what other choice did he have?

What he learns is why she's agreeing... To save her brother's reputation.

He had a choice...

Tell Felix and him possibly get pissed and protect her from ANYONE, even him, and ruin his and Felix's reputations.

Or...

Not tell Felix at all and let the problem continue to keep his reputation.

Other things also happen after this, but what if they're too much for both Mark and Rose to handle?

What will they do?