In 2013, Bianca Okorocha, a Nigerian artist who performs as ClayRocksU, received a DM from one of her Twitter followers. It was an invitation to Metal and Romance, a party in Lagos focusing on rock music — a genre long plagued by negative stereotypes in Nigeria. When she got there, she couldn’t believe what she saw: a whole community of fellow rock fans. “It was one of the happiest moments of my life,” she recalls.
Okorocha grew up listening to her father’s rock records, mostly by foreign bands. Through her teenage years…