Starting their relationship not long afterwords, the two went through many dangerous and even deadly trials, but after much drama, Drew proposed to her, making the two engaged.
Drew and Katie relationship began in the episode Don't Panic (1), although they shared their first kiss in the episode Mr. They stayed together until Come As You Are (1), but got back together later in the episode, just to break up again in Come As You Are (2) Drew decided he wanted to be with Bianca and wanted to break up with Katie for Bianca but decided it would be best to wait until Katie got out of rehab but he waited until after winter break. Brightside (2), Katie becomes aware of what happened with Vince and his gang.
He answers a call from Bianca, leaving a very upset Vince behind.
Bianca originally approached Drew while he was with Alli Bhandari and openly flirted with him, even going to the lengths of sending him sexy photos and inviting him to the boiler room for oral sex.
She also reveals the bruises that Vince had given her from their tumultous relationship.
Then, as Drew practices on his punching bag, Katie comes in and he tells her about Vince and Bianca. Drew gives Bianca a prom ticket so she doesn't have to stay with Vince that night. When Vince shows up, Drew confronts Vince and tells him to let Bianca go or he'll be in bigger trouble than before.