大切なコトバ (Taisetsu na Kotoba)

Background
The song was first uploaded on March 31, 2009, and is UniMemo-P's thirteenth original work. It's among some of UniMemo-P's notable works which achieved Nico Hall of fame (exceeding 100,000 views) the others being "RinLenLaRinRin" and his AkuMa Series' song "Pretty Panty AkuMa Rin".

Like many other UniMemo-P's works, the song is a mixture of talkloid (where the Vocaloids talk / a conversation occur in the middle of the song and such) and a upbeat pop. This song is featured in the compilation "VOCALOID minna no uta: Hatsune Miku" and managed to take the spot number 4 on the Weekly Vocaloid Ranking number 79.

"Taisetsu na Kotoba" tells a story of Len and Rin getting into a fight (later it's revealed they fought over some sweets). They realized they were both wrong in their own ways but they insisted on fighting anyway. They returned to their rooms thinking over, hating themselves for not telling their true feelings. In the end they both apologized for their behavior.