Another time, another place. An activation test of a decisive weapon was underway. With its development and operational trials shrouded in complete secrecy, the Another Number - Unit Null, suddenly breaks free of human control and goes berserk. For what purpose was Another Number - Unit Null created? The story of an Evangelion's activation, rampage and howling in another world. Shortly after, Kyou receives a very polite email, not only praising his music but also somehow discerning that he is, in fact, the composer behind TR03. The e-mail also asks for a meetup in a nearby park, to which he cautiously decides to go. To his surprise, however, he finds three elementary school girls at the meeting place! Suddenly, Jun Gotou, Nozomi Momijidani, and Sora Kaneshiro ask for his help to hold a concert in their home, an old church now used as an orphanage. And though Kyou is reluctant at first, after seeing their musical abilities, he eventually decides to accept their proposal. Based on the light novel of the same name by the award-winning Sagu Aoyama, Tenshi no 3P! follows Kyou as these three angels change his life.