Ane Kyun!

Intriguingly, upon returning home armed with snacks, juice, and candies - Hirokazu's preferred treats - Honoka discovered an unforeseen guest occupying her space: none other than the enigmatic Akasaki. A fellow classmate with a penchant for academic pursuits, Akasaki had been invited by Hirokazu to partake in a study session. However, it seems there has been a misunderstanding, as sweet younger sister Honoka erroneously assumed Akasaki to be her brother's romantic interest. Will the siblings devise a clandestine means of reconciling their differences while the intriguing Akasaki remains under their roof?