The series details the lives of four main characters named Natsuki, Tomoya, Keiichi, and Tsuyoshi. They spend their days trying to have fun by finishing their studies and debating about romance. Natsuki, one of the main characters, has a crush on a girl named Anna at school, while others often get involved in their relationship.
- Other Title: Nijiiro Days: Houkago Special, Rainbow Days: After School Special, Nijiiro Days Recap, 虹色デイズ 放課後スペシャル, Nijiiro Days, Rainbow Days, nijiirodays, Club Rainbow ~虹色デイズ~, 虹色デイズ
- Status: Completed
- Sub/Dub: Anime Sub
- Anime Type: Special
- Genres: Comedy, Shoujo, Slice of Life, Romance, School, Slice Of Life, Animation, Anime
- Score: 6.71
- Rank: 5483
- Popularity: 6551