Kousaka Kyousuke is an ordinary high school student living in Chiba, who has a bad relationship with his younger sister, Kirino. This popular sibling love comedy begins when one day Kyousuke was suddenly approached by Kirino for "life counseling". She may appear to be a cheerful girl leading a fulfilling life, but actually she is obsessed with "otaku" hobbies. While trying to help his sister with her life counseling, Kyousuke meets people like Kuroneko and Saori through social media. Although Kyousuke became much more immersed into "otaku" culture due to the influence of these people, his relationship with his sister gradually improved.