Includes the newly drawn extra story "Secret Coffee Shop" that appeared in "Char@ VOL.15". Please, repair this frame!" Hishida, a craftsman at a frame store who hates people, is asked to repair a frame of an unknown artist. The client is a handsome young man with a mysterious background. Hishida reluctantly works on the frame, but he discovers a hidden letter on the back of the painting...? In addition to the title story, this volume also includes a story of pure first love, in which a reunion with the person with whom he had his first experience after an eight-year absence brings back sweet memories of the time when his mind and body were stolen from him in high school.

Chihiro, who loves mythology, goes to the laboratory of Professor Tsukishima, whom he admires. There, he meets a mysterious professor and three beautiful women. At Tsukishima's urging, Chihiro draws a picture of a certain creature. This is the true form of the monster "INner" (the thing inside) that lurks inside people. She is told by Tsukishima that his memory made him draw it... The monster appears in front of Chihiro, who can't hide her confusion!?

"After School! Dungeon High School" is being serialized in the monthly COMIC Ryu! Masanori Yamanishi, the long-awaited first book of the phantom early works is finally gathered at the suspicious antique shop "Kuromori" which is just a recycle shop where Mako Kuromori, who doubles as a shopkeeper, Yuko Monobe, who is still wearing a Noh mask, and Satsuki Seike, a high school girl who aims to change her mind from a shackle, live together with a strange magic item!