Other name: 虹色DAYS; Oh My God Days; Rainbow Days
Summary: There on the other and Na-chan, whos bullying, and on the other side Mattsun whos popular. theres also Megumi-chan whos a sadic and Tsuyobon whos an anime otaku. And then those 4 are interweaving with both of their year and thats the beginning of silly and thrilling love stories.But at christmas eve, the heartbroken Nacchan met someone who has the uniform of Santa ?!