As the Neighbors Club get their film underway, Kodaka comes across Sena's classmate, Aoi Yusa, who considers Sena her biggest rival and believes Kodaka to be her boyfriend. Later that day, Kodaka comes across Pegasus, who had assumed he and Sena were dating and is shocked to learn that it isn't the case. The next day, Sena explains the confusion came about do to a comment she made about 'making Kobato her little sister', which he assumed pertained to marriage. She then reveals that both their parents had arranged at a young age for her and Kodaka to be engaged, as they had met once when they were really young. Kodaka decides they should just forget about it and keep it a secret from Yozora. However, Maria ends up blabbing about in front of everyone having learnt about it from Kate, which leaves Yozora completely depressed. After being recommended a movie by Kate upon hearing about the movie's plot, Kodaka discovers Yozora had completely plagiarized the script from the movie.

On the day of the screening, Kodaka finds Rika had passed out with a fever before she could finish the movie. Feeling it isn't right if everyone isn't present to see the movie, Yozora and the others unanimously agree to cancel the screening. After briefly running into Aoi whilst taking down the flyers for the screening, Kodaka goes to the infirmary to visit Rika, who gets him to read a BL book to help her get to sleep. After recovering from her fever, Rika finishes the movie and screens it for the Neighbors Club, with everyone feeling proud of what they've made. Later, Aoi swings by the clubroom to question the club's activities, to which Yozora responds with a thorough explanation, shooting down any query that Aoi brings up. However, she soon retorts that Maria doesn't qualify as a club advisor since, as it turns out, she is not a real sister. Luckily, Sena has Pegasus arrange for Maria to become an official teacher, allowing the club to continue legitimate operation. After Aoi is chased out, Sena casually mentions that she loves Kodaka and wants to marry him, but Kodaka once again pretends he didn't hear anything and walks out.