|Episode 6 - The Karaoke Box Has Few Customers|
Wikipedia summary: <spoiler /><spoiler>
Kodaka wakes up with Kobato in his bed after a dream about his childhood friend, who he did not get to say goodbye to before he moved. At the Neighbors Club, the members reflect on their progress of making friends so far. Kodaka and Sena believe their reputation has dropped since attending the club. As they continue to discuss activities they engaged in after joining the club, Sena asks if the other members ever been to a karaoke box. Although Kodaka has been to one before, Yozora shares her past experience of going to numerous karaoke boxes citywide, making the other members interested in going to a karaoke box. Sena initially declines and calls this an unsophisticated activity, but after Yozora starts making plans for the others, Sena pleadingly agrees to join in. At the lobby of the karaoke box, Yozora argues with the clerk over the pricing system as she feels they have been cheated. After the negotiations, Yozora and Sena choose to rent separate rooms, while Kodaka and the others share one. After the karaoke, Kodaka and the others, exhausted from singing, find Sena and Yozora already in the lobby. Apparently, the two found a way to compete in karaoke through the scoring mode. As they walk home, Sena tells Kodaka that her father is interested in meeting him, making Yozora feel jealous.
My comments:<spoiler /><spoiler>
I guess a lot of time has passed between the first episode and now... everyone starts to realize the only thing they've been doing in this club is playing video games.
Yozora went to tons of karaoke places with her imaginary friend before. It's kinda funny that because of this, she never realized that karaoke boxes charge based on how many people are with you. Yozora and Sena both tried to cheat the system by getting separate rooms for the lowered prices, but Kodoka didn't follow along and paid for him and the 3 others to go together.
Sena and Yozora both decided at the same time to sing the same song, and it was performed as a duet with them in separate rooms. They later explained that they started competing against each other on the leaderboards, with Yozora trying to defend her rank.
By now, it's obvious that although the 3 other girls all like Kodaka a lot, Sena and Yozora are meant to be the main love interest rivals.