A techno-reflective narrative interview (TRNI) aims to elicit learners' investment in the language practices in a course — their stories, participation, and ways of participation (Zhang, 2023). This presentation elaborates on the notion of TRNI and how it can be adopted to investigate EFL and ESL learners' L2 investment in a given course. Drawing from Darvin and Norton's (2015) investment model, two examples are provided as two cases: 1) how a Mainland Chinese EFL learner invested in her EFL learner, gender, and role identities (Zhang, forthcoming), and 2) how a Hong Kong undergraduate ESL student invested in her Hong Kong English, multilingual, and Hongkonger identities (Zhang & Gonzales, forthcoming).The study highlights how TRNI helps to provide a reflective account of L2 learners' investing trajectories and empowers them by amplifying their own voices and self-positioning. Overall, the findings reveal the 1) concomitant effects of participants' English learning experiences and life histories on their investing patterns; 2) the interconnectedness of identities, capital, and ideologies; and 3) their combined effects in shaping Chinese English learners' investment in two courses. It provides specific guidelines for lecturers to adapt TRNI in their own courses and pedagogical implications for L2 practitioners and universities. Copyright © 2023 HAAL.