Based on an adult game by Atelier Kaguya.
Touya returns home during summer vacation to find 4 older women (Rio, Nagisa, Amane and Sara) awaiting him. They have been hired as live-in home tutors for Touya. However, his lessons are not limited to book-learning…
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![Kateikyoushi no Onee-san Episode 1 [Sub-ENG]](https://upload18.cc/v/KATEIKYOUSHI-NO-ONEE-SAN-1-SUB-ENG/poster.jpg)
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