Complex sentence: On June 5,2017, Raina released her third OST titled "When Rain Falls" for MBC drama "Lookout", which After School member E-young participated in lyric-writing, composition and arrangement for the track.
Split into simpler sentences: On June 5,2017, Raina released her 3rd OST titled "When Rain Falls" for MBC drama "Lookout". Fellow After School member E-young participated in lyric-writing, composition and arrangement for the track.