Shikimori seems like the perfect girlfriend: cute, fun to be around, sweet when she wants to be... but she has a cool dark side that comes out under the right circumstances. And her boyfriend Izumi loves to be around when that happens!

Based on the literary work of Shikibu Murasaki, The Tale of Genji is a story of the Emperor`s second son born by a courtier. Made a commoner, he served as a retainer to the court.

When Sanpeita Kobayashi was a child, his lovely friend had to move away, but she vowed that in ten years, they would meet again—as husband and wife. Ten years later, Sanpeita is a high school student, but he hasn't forgotten the feelings they shared. Sanpeita awakes from a dream about his last day with her, only to have his morning interrupted. A weird robot girl is battling other robots in his bedroom, claiming to be his wife. The robot's pilot looks like none other than Sanpeita's long-lost, childhood friend. But who is she really? Why did she have to leave? And what does she have to do with the Mishima Electronics Corporation?

In an old mythical world, there reside spirit-like beings who oversee the natural order of the mortal realm. One of them, a young girl named Chun, has just come of age and must undergo her rite of passage by experiencing the human world for herself. While there, she gets caught in a fishing net during a storm and is rescued by a human boy.

However, the boy ends up drowning during the incident, and Chun returns to her realm full of guilt. Afterwards, she meets the Soul Keeper and decides to revive the boy in exchange for a part of her lifespan. Little does she know, meddling with the natural order of the world has severe consequences.

Da Yu Hai Tang is a story about sacrifice and redemption as Chun comes to terms with the limitations of her powers and deals with death, love, and her own emotions. She must decide if she will sacrifice everything to save the human boy or forsake her moral obligation for the order of the world.