Ep 1. My Little Sister Can't Be My Love

It is the first episode of the anime series Oreimo, where we are introduced to the protagonist of the show, Kyousuke Kosaka. Kyousuke is a high school student who has a strained relationship with his younger sister, Kirino. However, one day, Kyousuke discovers that Kirino has been hiding a secret from him - she is secretly an otaku, with a particular liking for anime and video games.

At first, Kyousuke is taken aback by this revelation, as he has always believed that his sister was too perfect to have any interest in such things. However, he quickly realizes that he may be able to connect with his sister over her hobbies, and the two begin to bond over their shared love of anime and video games.

As they grow closer, Kyousuke finds himself developing feelings for Kirino, much to his horror. He knows that his feelings are wrong and taboo, and he struggles to keep them under control. However, he cannot deny the fact that he finds his little sister incredibly attractive, and he begins to question his own moral compass.

Meanwhile, Kirino begins to confide in Kyousuke about her own struggles in the otaku community. She is bullied and ostracized for her interests, and she feels like she has nowhere to turn. Kyousuke, who has always been protective of his little sister, is determined to help her however he can.

As the episode progresses, we see Kyousuke and Kirino navigating their new relationship as siblings and otaku. Kyousuke tries to keep his feelings in check, but he finds himself drawn to Kirino more and more as they spend time together. Kirino, on the other hand, is grateful to have someone who understands her passions, and she opens up to Kyousuke in a way she has never done before.

The episode ends with Kyousuke realizing that he cannot keep his feelings for Kirino a secret anymore. He knows that it is wrong and taboo, but he cannot ignore the fact that he is in love with his little sister. However, before he can come to terms with his feelings, Kirino drops a bombshell - she has a boyfriend, and she needs Kyousuke's help to keep her relationship a secret from their parents.

Overall, the first episode of Oreimo sets up the central conflict of the series - Kyousuke's forbidden feelings for his sister, juxtaposed against their love of anime and video games. The episode does an excellent job of establishing the characters and their motivations, and it leaves the viewer curious to see where the story will go next.