By 2006, he released his second album M.e. and followed by a concert organized by Lantis to promote the release. The album included "Carry On" and "CLOWN", which were also released on the soundtrack for the series Muv-Luv. Masaaki Endoh released "ENSON" and "ENSON2" in the summer of 2008, which proved to be a massive success. The album contained covers of popular anime opening themes in the late 1990s and early 2000s, including "Uninstall" by Chiaki Ishikawa and "Sousei no Aquarion" by Akino.