Read manga: Choko Beast!!

manga
Artists: Asano Rin
Status: ongoing
Updated at: Aug 25, 2019
Summary:

Keita and his family visited his mother hometown, and his grandfather told him not to go near the mountain because "Tengu lives there". Based on those words, Keita decided to explore the mountain. But instead Tengu, what he found there was a weird little girl. And the sweets Keita gave her became the starting point of their story...