Complex sentence: According to a 2013 interview, when the lead vocalist, Nanae, was in 11th grade, she wanted to start a band and invited her friend, who introduced her to Michiru who could play the guitar.
Split into simpler sentences: According to a 2013 interview, when the lead vocalist, Nanae, was in 11th grade, she wanted to start a band. Her friend introduced her to Michiru who could play the guitar.