E4. My Little Sister Can't be Going to Summerket

One day, Kirino's non-otaku, "public" friends -- Aragaki Ayase and Kurusu Nanako -- come over to visit. Kyousuke is harshly told by Kirino to not let her friends see him. Just then, a delivery arrives, but Kirino, duped by the high-end cosmetics box it came in, snatches it away from Kyousuke. In reality, though, the package was sent by Saori Bajeena, and contains things that must never be seen by Kirino's non-otaku friends.