It's a DMC fanfic, there's quite a few of them.
- Tess giving Dante a fire-charge boost that enables him to break out of being encased in ice.
- Tess rescuing Dante from drowning in the freezing water following the Chernobog battle, despite the fact that as a fire person, cold poses a serious danger to her.
- Dante's Big Damn Heroes moment when he rescues Tess from the fire-proof demon.
- The whole sequence with Chax.