Nijiiro Days (MIZUNO Minami)
The series Nijiiro Days (MIZUNO Minami) has been licensed, it is not available in MangaHere.
There's Na-chan, who gets bullied, and then there's Mattsun who's popular. There's also Kei-chan, a sadist and Tsuyopon, an anime otaku. The four's lives interweave during their school year, and that's the beginning of silly and thrilling stories of friendship and love. One Christmas Eve, the heartbroken Na-chan met someone in a Santa uniform?