The story is about a witch named April with the power to turn lies into reality. Due to this terrifying power, April is confined in a small house. However, once a year on April 1, April opens the door to her house to visitors. (Source: Tsuki-kan)

Once, there was a large war. The war ended, and the world became peaceful. Now, anyone has a "Holy Grail" and summons a Servant bound to their fate. There is only one girl, Utsumi Erice who doesn't have one. This girl encounters the last Servant summoned into the world, a boy. But, she has no idea what her fate shall be.

"I think you've lost if you fall in love—" —Hinooka Homura. Seiran High School 1st year. She likes to talk with friends. What she doesn't like are essays. By the way, she's the type that gets sleepy after thinking for ten seconds. Basically, she had the air of someone who had failed her high school debut. When Homura received the invitation "Why don't you try becoming a magician?," she joined the exploration club which had ties with the National Union. The club activities consisted of conducting research on an unknown planet. Along with the kendo boy Touya Takumi, Misasagi Mayo who was efficient both in her studies and in martial arts, as well as the golem Ameno, Homura parties with her friends and heads to the other world of Nutera, a huge scale planet that is several times the size of Jupiter. (Source: Official site)