According to TEAM H special website news, ‘Summer Time -Japanese Version-‘ will be released online at 0:00 on August 18th, earlier than their 5th album ‘Mature’. Tree-J introduced on their Twitter how to buy on iTunes and Apple Music from Korea. We’re still not sure if you can download from Spotify outside of Japan. But the special website introduced Spotify as one of the online music shops. I think you can try to access Spotify Summer Time –Japanese Version- page after August 18th 0:00. In addition, some of Jang Keun Suk and TEAM H songs are already available on Spotify.
Jang Keun Suk: https://open.spotify.com/artist/7MiZ1NWgfSmVM4Yj0Qbz6K
TEAM H: https://open.spotify.com/artist/3OOtuve788y64B4qKtZoci