The Kodoku na hana Add-on for Groove Coaster has 10 achievements.
Play Kodoku na hana 20 times
Play Kodoku na hana and clear all of SIMPLE, NORMAL and HARD
Play Kodoku na hana and get A Rank in SIMPLE, NORMAL and HARD
Play Kodoku na hana and get S Rank in SIMPLE, NORMAL and HARD
Play Kodoku na hana and get S+ Rank in SIMPLE, NORMAL and HARD
Play Kodoku na hana and get S++ Rank in SIMPLE, NORMAL and HARD
Play Kodoku na hana and get A Rank in EXTRA
Play Kodoku na hana and get S Rank in EXTRA
Play Kodoku na hana and get S+ Rank in EXTRA
Play Kodoku na hana and get S++ Rank in EXTRA