Miura reprised his role as Jesse for The Confidence Man JP: Episode of the Princess. In March 2020, he was cast as Hiroyuki Ishimura in the television drama Gift of Fire, which was set to broadcast in August 2020, and reprised his role for the series' film continuation. In the same month, he released his fifth photobook, Nihonsei, in two different versions, with one version including a documentary photobook. He co-starred in the Japanese stage production of Whistle Down the Wind as The Man, which ran from March 7 to April 23, 2020. On his 30th birthday on April 5, 2020, he revealed on an Instagram live-stream that he was releasing "Night Diver" as his second single in early Q3 2020, which contained three songs from different genres including a dance song and a love song. He also stated that he composed and wrote the lyrics for "You & I", one of the B-side tracks, and "Night Diver" was later set to debut on Music Station on July 24, 2020. He was set to have his first concert events in Q4 2020, but they were cancelled due to the COVID-19 pandemic and were planned to be live-streamed instead. He co-starred in the television drama Love Will Begin When Money End, which will be broadcast in September 2020, and was also cast in the musical The Illusionist, which was set to run in December 2020.
