The early sound of Chase Atlantic was described as pop punk, and their music was described as pop rock. Their sophomore EP, Nostalgia, was released in February 2015. The song ''Friends'' was featured in several Tumblr edits. They signed with Benji and Joel Madden's management company in early 2016. The band released ''Obsessive'' in January and ''Paradise'' in February, and conducted extensive promotional efforts for the record. They played the entire EP during their tour in Australia.