"I don't care about love or romance.'' Twin high school students Ruri and Midori Ariya are known as the "Ariya Brothers''. They have beautiful eyes and a frighteningly similar appearance. Kaoru Usami, a classics teacher, was able to tell the difference between the two. After seeing the twins in a certain way, Usami begins to release the desire within himself. There is a special relationship between just the three of them.