the three-date March on the Darkness joint tour with lynch. between August 31 and September 21, and performed at an event hosted by Plastic Tree on October 12. On December 27, Mucc faced Sid in the main event of Maverick DC's Battle Arena in Budokan, where each band alternated playing songs before joining together for the last two. Mucc made the song "Brilliant World" digitally available on December 24 for a limited time as a Christmas gift to fans. Between January 23 and April 1, 2016, Mucc and Aki (bassist of Sid) held a joint tour titled M.A.D, which also featured other acts and guests. Mucc performed at Dappe's Rock in Jōsō on May 1, a concert organized by Toshi-Low of Brahman to help revitalize Ibaraki Prefecture after flooding the previous year. On June 25, 2016, Mucc a launched a nationwide tour that ended in September but was an early lead up to their 20th anniversary the following year. After Ken took part in several shows on their M.A.D tour, Tatsuro conceived the Party Zoo ~Ken Entwines Naughty Stars~ tour centered around the guitarist. It took place between September 11 and October 9 and also featured Mucc, A9, Baroque and others. Mucc released the single "Classic" on September 19, and it was used as the opening theme song of The Seven Deadly Sins: Signs of Holy War. They performed at the visual kei rock festival Visual Japan Summit at Makuhari Messe on October 16, and at Knotfest Japan on November 6. 20th Anniversary and Satochi's departure (2017–present) 2017 marked Mucc's 20th anniversary. After the release of their thirteenth studio album Myakuhaku on January 25, they gave a special free live performance on February 4, where only people who bought the special edition of the album were eligible to attend. On March 29, they released the compilation albums Best of Mucc II and Coupling Best II. On May 1, Mucc were appointed ambassadors of both Ishioka, Ibaraki (where Miya and Yukke are from) and Mito, Ibaraki (where Tatsuro and Satochi are from). They were tasked with promoting Ibaraki Prefecture after it ranked last four years in a row in a survey on the attractiveness of prefectures. Mucc sold the limited single "Ieji" at the concert at Ibarakiken Bunkacenter Large Hall on May 4, and their two 20th anniversary concerts at the Nippon Budokan that were separated by years; 97–06 on June