Natsum's friendship notebook. Volume 2. Midorikava Yu.

Takashi National Suma is a teenager who inherited his grandmother Raiko a friend of friendship - a collection of contracts with otherworldly creatures. Since then, he returns their names day after day. But once to him is a black cat, very similar to Kotya Sensei, and runs away, taking a notebook with him. What will the Tsuma and his spirit-guide set in pursuit in pursuit of the thieves in their path?

The book included the 3rd and 4th volumes of the original manga, chapters 9-15.