The all female crew of the transport ship Muse is on a mission in deep space. They pick up an SOS signal and discover a derelict space cruiser where all the women have died mysteriously. They take the only survivor, a young woman named Flair, and detonate the ghost ship. However, the danger is just beginning. With Flair on the Muse, the romances between the women begin to take a new turn. One by one, the crewmembers are attacked by a mysterious alien presence, desperate to find a way to reproduce with human women!
Mankind's problems are tempting the moon to move away from the planet Earth, but Kaguya, a superhuman spiritualist, is attempting not to let it go off too far. She comes down to Earth from her home in outer space to help solve the relationship problems of people. Her first assignment involves foiling a perfect murder and a bit of gender-bending as she tries to help Tanaka revive the life of his dream lover and get revenge on the killer, which was her ex-girlfriend. The second assignment involves pulling a sexually frustrated teenager's spirit out of a video game after the stress of being dumped forced it outside the body.
The second chapter in the Refrain Blue series focuses on Nao Morisawa and the events that happened at the summer camp last year, with her and Yoshihiro Matsunaga both unable to let go of feelings of the past.
The first chapter of the Refrain Blue series, tells about the recollection of Yoshihiro's past about various events of summer school, of the fate where encounter and separation are interwoven with each other, as Yoshiro and Matsunaga will pass the Toyo Gakuen and will arrive at summer school at seashore. A mysterious girl smiles as she watches Yoshiro who stands still at the seashore dusk.
It's been years since hero Takeru was at the top of his game. And now, it's time for Takeru's son, Kakeru, to take up the heroic knight's mantle and save the kingdom from a burgeoning evil. Lucifon's minions are on the march, preceded by a mysterious black mist that turns everyone it touches to stone. Led by Eto, Kakeru and his friends must take the fight into the very heart of Lucifon's despotic empire or become statues for his garden.
In the last chapter of the Refrain Blue series, the bond between Yoshihiro Matsunaga and Nao Morisawa grows stronger, while Yoshihiro finally finds out the identify of the mysterious girl from the first chapter.
Up and coming pop idol star Ikumi Murase seems to have everything a girl could want beauty, fame, fortune and even a handsome boyfriend! But not everyone is pleased with Ikumi's success. Akira, Ikumi's beau, is starting to resent the fact that she never has time for him. To top it off, Ikumi's jealous co-star Ms. Lieh wants to bring Ikumi down at any cost even if it means summoning an ancient demon.