O.WHEN ‘이대로 괜찮을까 -HUSH OST Part.3’ Track List 01 이대로 괜찮을까 (No regret)    Album Review 01 이대로 괜찮을까 (No regret) Lyrics by 윤사라 Composed by Courtney Stahl / Johan Gustafssoon / Freddy Alexander / Sebastian Lundberg Arranged by Johan Gustafssoon 通过散发英伦摇滚风格、氛围轻快明亮的乐队歌曲加上O.WHEN感性的声线，打造出与众不同并具有感染力的氛围。 蕴含了对于现实生活的烦恼乃至期盼着未来希望的信息的歌词与添加了明快的铃鼓的清爽乐队音乐完美相融，带给人正向积极的感觉。