In the early stages, her catchphrase is "It's not like I like you or anything!" In the final relationship, this evolves into a flustered, "I... I care about what happens to you. Don't read into it." The denial becomes performative, a habit rather than a wall. Her actions—showing up when he's sick, defending him in public, remembering small details—have long since confessed what her mouth cannot.
Plan out your scenes. This could include moments of tension and comedic relief, leading up to more intimate and emotional scenes. Lovely Sex with Tsundere Girl -Final- -Completed-