20, and 06–17 on June 21. They also released three self-cover albums, beginning with Shin Tsūzetsu and Shin Hōmura Uta on August 9. The third was September 13's Koroshi no Shirabe II: This is Not Greatest Hits, the title of which was taken from Buck-Tick's similar Koroshi no Shirabe: This Is Not Greatest Hits. It was supported by a five-date tour that ended on October 10. Mucc covered "March 5" by Plastic Tree for the cover album Transparent Branches released on September 6, and "Crazy4You" by D'erlanger for the tribute album Stairway to Heaven released on September 13. A tribute album to Mucc titled and featuring 22 artists, was released on November 22. It was supported by the En 7 tour, which was held with bands that contributed to the album, such as Dezert, Flow, and Band-Maid. The tour ended on December 27, where Mucc hosted a special festival at the Nippon Budokan to end their 20th anniversary with eight of the other acts. They also hosted a year-end countdown event in Ibaraki on News Years Eve with many other artists. With the end of 2017, Mucc returned to being an independent band on Danger Crue Records yet again. They sold the cassette "Jiko Keno Demo ~Dirty Ver.~" at every night of their June 2018 Lock on Snipe Tour #1: Hokkaido-gata Shūkan 6 Days, while "Jiko Keno Demo ~Clean Ver.~" was released digitally on June 11. They released the single "Jigen Bakudan" on July 25, 2018. Mucc's Lock on Snipe Tour #2: Shikoku-gata Shūkan 4 Days took place in October, while #3: Hokuriku-gata Shūkan 6 Days took place in December. The members of the band were four of the 76 people to make cameo appearances in the music video for Flow's song "Oneness". Mucc held an eight-date joint tour with Dezert, titled Is This The "Fact"?, throughout January 2019. Under the name "DEZERMUCC", the two bands collaborated on a two-track CD sold on the tour. For February 13's concept album Kowareta Piano to Living Dead, Mucc recruited keyboardist Tooru Yoshida as a limited-time member. The album was based on 140 of the band's early demos. It was supported by a Zepp tour that ended on April 1, and a hall tour that took place between May and June. Throughout the second half of 2019, they held 33 concerts as part of Lock on Snipe Tours #4–8 and released four singles