I was also surprised when I found that there's a sequel to Just Be Friends by Megurine Luka. I like that song! This is song has given a conclusion to Luka's unknown side on the Just Be Friends song; that she has moved on, found someone new yet she still thinks of her former love sometimes. 

The song is short yet the tune is catchy, not too upbeat like JBF. Just gives the light feeling of music for someone who now enjoys living a new life, like the calm after the storm. ;)