|Release Date||July 25, 2010|
|Volume||Light Novel Volume 4|
Sisters is chapter 46 of the Boku wa Tomodachi ga Sukunai Light Novel series. It is chapter nine of volume four.
A day after their finals ended, Maria came to Kodaka's house just as he was cooking their dinner and explained to him that she ran away from her home, much to Kodaka and Kobato's surprise. By then, Kate, the older sister of Maria, called, telling Kodaka to take care of Maria as she stayed at their house but Kate also gave him the option of bringing Maria back to their house. After Kodaka agreed in letting Maria stay, Kate hung the phone.
Afterwards, Kodaka, Kobato, and Maria had dinner, which ended with a competition between the two girls. As they were, Kate called as Kodaka informed her that they were currently having dinner and Kate advised Kodaka to tell Maria to eat her vegetables. After hanging up, Kodaka found the dinner table completely gone with food as Kobato and Maria point at each other after Kodaka asked who was responsible.
Later, as Kodaka wash the dishes and Maria following her, Kate called again and Kodaka informed her that Maria ate all her vegetables before hanging up again. Afterwards, Kobato asked her brother to play a video game with her but instead let Maria take his place. After taking a bath, Kodaka called out to both Kobato and Maria to take a bath and Maria went first and Kodaka informed Kate as she called that Maria is currently in the bath. As Kodaka and Kobato play, Maria came out the bathroom, naked, and complained as the pajamas provided to him by Kodaka is tight on her chest causing Kobato to yell at the latter to not sleep. With no other clothes to wear, Kodaka provided Maria with his t-shirt and Maria happily accepts.
After hours of video gaming, Maria finally fell asleep which was followed by Kobato as she went to her room. After laying Maria down in a futon, Kate called again and told Kodaka to have him brush Maria's teeth before Kodaka can ask Kate if she's a siscon, causing Kate to yell in retort at Kodaka through the phone and hang up. After brushing Maria's teeth, Kate called numerous times until Kodaka was able to unplug the phone.
The next morning, Maria decided to head back to her home and Kate came to pick her up. After apologizing for being a bother, Maria asked Kodaka if she can come again next time. As Kodaka agreed, Kobato yelled at Maria to not come back as Maria yelled back at her in return. When the Takayama sisters left, Kodaka found Kobato playing her video game as training for when the next time Maria visits their house, causing Kodaka to smirk at his little sister.