How could my sister be so cute

The 17-year-old ordinary high school student Kousaka Kyosuke (voiced by Nakamura Yuichi) who lives in Chiba Prefecture has a 14-year-old sister, Kosaka Kirino (voiced by Taketatsu Ayana). However, for a long time, this cute-looking sister has not had a close relationship with him, and sometimes it can even be described as cold. What happened to my sister? Finally one day, a secret about Kirino was discovered by Kyosuke. The cute sister is actually the brother-controller of the otaku style? ! Although Kirino denied it in every possible way, the facts cannot be disputed. Later, the daughter-in-law Makishima Saori (voiced by Hitomi Nagotenme) and the poisonous-tongued girl Gogeng Ruri (voiced by Hanazawa Kana) who originally only appeared around his sister gradually came around Kyosuke. Like his sister, they are both Akihabara otakus. Kirino, who feels extremely depressed because she is a brother-controller, will develop an interesting relationship with her sister-controller's brother Kyosuke.