Otaku Baa-chan
A slice-of-life about a grandma who had been captivated by 2D characters and became an otaku even after turning 80, and her grandson who kindly watches over while trying to keep a straight face!
A host and a high school student are also involved, are they going to show off their otaku power...!?
(Source: Kadokawa, translated)
Note: Includes 1 extra chapter.