"A classmate still remaining here is the cause of human extinction." That's what it said in the letter from the past, written in the familiar handwriting of my friend. The next day, I decided to go to school, though I can't remember how many weeks it's been since I last went. 'I decided to go search for the culprit' would be a lie, but 'it didn't matter' would also be a lie. "Hey Arata, I almost thought you'd forgotten how to come to school." Oh, アラタ (Arata) refers to me by the way. It's written as 新 in kanji. The kanji is often misread as シン (Shin) though. "Huh, and what'd you come here for Nouko? Come here often?" The students here are what you would call 'the losers'. At least, from the perspective of time travel, they are all classified as useless. I am also one of them.

Ikagawa Togake is a boy with a superpower. He has the the ability to change the color of his eyes whenever he closes and reopens the eyes. Kinda useless, right? Regardless, Ikagawa Tokage strives to strengthen his power in an effort to become the strongest and not have his power be nothing more than a parlor trick. With that desire in mind, he trains daily in an abandoned building in modern day Tokyo. But on one such day, he comes to what looks to be a scene of a crime and feels the culprit might still be nearby. Will he make it out of the abandoned building alive? Is there more to his power than meets the eye?

There are twenty independent stories written by twenty different authors, sharing the common theme of "April". An anthology that is considered a rare item as it has never hit the shelves as a standalone book. There is no ISBN and it is an unbuyable except in online auctions. The anthology was published as a bonus gift to Dengeki Magazine readers in 2009.

Summer, closed off from the outside. It was here where we lived. The girl who lived nearby, Jougasaki was one who lived off her whims. This morning, she invited me to go to the sea to look at whales and I obliged. 11-years old her and 17-years old me, but this isn’t love, I think. If only this peaceful wednesday could continue on forever—. Summer morning, after waking up, I stand before the mirror as I arranged my thoughts as always. “Umino Yuki, 17-years old, sex: female, Class 2-C, both parents healthy—” I brush aside the hair covering my face and shift from me to her. I check that today was wednesday. Now, time to try my best for another three days—. Then Jougasaki declared, “I want to destroy this world. In this closed-off seaside streets, I met her today once again. Source: KADOKAWA