This case study investigates students' perspectives on their mathematics learning experiences and identity constructions, in the context of transition to secondary school. In-depth, semi-structured interviews were conducted with six girls, halfway through their first year at their new school. Thematic analysis and discourse analysis were used to interpret and deconstruct their narratives. The girls' stories contribute to our understandings of how confidence in mathematics is discursively constructed. The stories also clarify the importance of gaining a sense of belonging in the transition from primary to secondary school mathematics. Through promoting this belonging within the mathematics classroom, teachers may engender confident performances in class and, through this, contribute to the construction of positive mathematical identities.