Ep 9. My Little Sister Can't Be This Absorbed Into Eroge

Kousaka Kirino is a high school girl who is secretly obsessed with anime and eroge (erotic games). Despite trying to keep her interests a secret, her older brother Kyousuke discovers her collection of eroge and confronts her about it. Kirino is surprised that Kyousuke isn't angry and instead asks him for advice on how to complete a difficult scenario in one of her games.

Later, Kirino becomes engrossed in a new eroge and neglects her responsibilities at school and home. She even skips a study session with her friends to play the game. Kyousuke confronts her again and tries to convince her to be more responsible, but she brushes him off and continues playing the game.

As Kyousuke struggles to understand his sister's obsession with eroge, he seeks advice from his childhood friend and neighbor, Manami. Manami tells him that Kirino is just going through a phase and that he should try to understand her interests instead of criticizing her.

Meanwhile, Kirino meets a fellow eroge enthusiast named Kuroneko. The two bond over their love for a particular game and Kirino begins to spend more time with Kuroneko than her real-life friends.

As the episode comes to a close, Kirino's obsession with eroge reaches new heights. She spends all night playing the game and ends up falling asleep on the floor. Kyousuke finds her and realizes that he needs to find a way to help his sister before her obsession completely consumes her.

Overall, "My Little Sister Can't Be This Absorbed Into Eroge" explores the theme of obsession and the consequences of neglecting responsibilities for personal interests. It also showcases the complex relationship between siblings and the importance of understanding each other's interests and motivations.