一心不乱 (Isshinfuran)

Original =

DIVINE-DIVA version =

Background
"Wholeheartedly" is an original song by Umetora and is one of his most notable songs.

It was later rearranged and uploaded as "Wholeheartedly version, D/D".

The original version has entered Hall of Fame and is featured in the album DIVINE-DIVA.

This song was performed live at Nico Nico Music Party 2013, albeit with Rin performing in place of GUMI.