Comprehensive Manga: I, Hikigaya Hachiman, Summon C's Mother at the Beginning

Ah, why am I involved in such a complicated matter..." Hikigaya Hachiman said. One day in mid-January, in order to thank Yukino, Yuigahama Yui brought a mysterious red leather book with an ominous atmosphere from a second-hand bookstore. Next day Have you read that book? Hachiman asked Yukinoshita. Regardless, he was still somewhat interested. Well, I only watched a little bit ? What kind of book is that? Well... Put it this way. Although not sure if it can be called a real book, I think it may be a so-called magic book "Let's try what's in the book! " Yuigahama Yui's eyes shone. However, Mother C was summoned, and Hachiman was forced to get involved in the Holy Grail War, but he decided to use the Hikigaya style of fighting, which is also called! ..... Turtle style of play... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.