About “Blue Friend”
Blue Friend is a yuri manga series created by Fumi Eban. It was first serialized in Shueisha's monthly shōjo manga magazine Ribon in 2010. A one-shot sequel titled Blue Friend: After Days was also released in 2010. Follow-up works include the sequel series Blue Friend: 2nd Season and the spin-off Blue Friend: Nijiiro no Kanojo, both released in 2011. (Summary adapted from Wikipedia, CC BY-SA 4.0.)
Some summaries adapted from Wikipedia, CC BY-SA 4.0.