Tokyo Girls Collection
On July 19, 2017, Atae released "Goody-Good Girl" as a digital single. Later in the year, he released "Can't Stop" and performed both songs at the Girls Award 2017 Spring/Summer and the 2017 Tokyo Girls Collection fashion shows. In August 2017, he started his own fashion brand, I Am What I Am. On November 2, 2017, he released his travel book, "Shinjiro's Travel Book", which documented his experiences while studying abroad in Los Angeles in 2016.