Fate/Prototype is a digest version of Kinoko Nasu's original version of Fate/stay night.

As soon as he entered high school, the first year student Koshiyama Shiki was invited to the mysterious Quiz Study Group led by his senpai. What will Shiki run into when being dragged along by his class mate Mari into the dazzling world of competitive quizzes?! (Source: Comic Walker)

A nonsense comical mystery. Harumi Kazuhito is a high school boy who loves books and is a fan of novelist Natsuno Kirihime. One day, he finds Kirihime writing at a cafe, about to be shot by a robber. He protects her from the attack but is killed instead. Through the supernatural power of a book-worm, he is reincarnated as a dachshund dog. Kazuhito (as a dog) writhes in a painful bookless life, when a sadistic woman carrying a pair of scissors offers him help. She is Kirihime herself. (Source: Dog and Scissors Wiki)

Merc Storia takes places in a world where humans and monsters coexist. The protagonist, Yuu, is a healer apprentice and possesses the ability to tame monsters. In a quest to regain the memories of Merc, a girl confined in a bottle, the pair embarks on a journey. (Source: MAL News)