Snowbaz

Snowbaz is the slash ship between Simon Snow and Tyrannus Basilton Pitch.

About
They are both central characters in the novel Carry On by Rainbow Powell. They also make appearances in fanfiction of the titular character in Fangirl.

Canon
They were nemeses once. However, Baz had a crush on Simon since he was twelve, and fell in love with him at fifteen.

The two finally got together at eighteen. (Carry On, chapter 63/4)