NEW DELHI, Jan. 15 -- After completing his graduation in French literature from Delhi University in 2018, Ngahon Tungshangnao returned to Manipur to be with family and plan a career. One day, while scrolling through his Instagram feed, he had a Eureka moment: Why not combine his love for fashion, vintage and contemporary, and turn it into a business that enables a sustainable life? On 20 February 2019, he opened Mirinwon (named after his mother; it means "everlasting flower"), a thrift store on Instagram.

Offering clothes and accessories-from vintage Levi's jeans to Superdry sweatshirts and the occasional Prada bag-Mirinwon has since garnered close to 10,000 followers on the app, many of them whom have become loyal customers. "It started a...