'Produce 101' unit Rainz sings 'Let It Go, Let It Be' for 'Hospital Ship' OST, their first ever song together
![](https://www.askkpop.com/images/upload/18/ifrit1112/2017/09/09/Produce-101-unit-Rainz-sings-Let-It-Go-Let-It-Be-for-Hospital-Ship-OST-their-first-ever-song-together.jpg)
Rainz includes seven members:Joo Won Tak(rank 62),Hong Eun Ki(rank 38),Lee Ki Won(rank 53),Byun Hyun Min(rank 45),Seo Sung Hyuk(rank 31),Kim Sung Ri(rank 47), andJang Dae Hyun(rank 83). The group has 5 vocals - Wontak, Eunki, Kiwon, Sunghyuk, and Sungri, and two rappers Hyunmin and Daehyun, who will all debut in October.