|Episode 4 - Underclassmen Don't Know How to Hold Back|
Wikipedia summary: <spoiler /><spoiler>
Kodaka meets ten-year-old teacher Maria Takayama, who was tricked by Yozora into becoming the club's faculty adviser. Maria tries to reclaim her room and refuse being a faculty adviser, but Yozora tricks Maria again by noting that adults can handle the job. Maria accepts and Yozora welcomes Maria as a full club member. Later, Kodaka tells Yozora and Sena about his sense of being stalked. Yozora and Sena try to help, but only lower Kodaka's reputation. Kodaka later catches the stalker, an effeminate boy named Yukimura Kusunoki, who sees Kodaka as a role model and notes that everyone sees him as a girl. Yozora lets Yukimura join the club for him to study about Kodaka and become manly, so Yukimura accepts and starts serving Kodaka. The next day, Kodaka saves a scientist named Rika Shiguma after she collapses in a chemistry lab. She finds Kodaka shortly afterwards and wants to repay him somewhat promiscuously. Rika joins the Neighbors Club, where it is revealed that she is also fascinated with dirty magazines particularly involving mecha, much to Yozora's dissatisfaction. </spoiler>
My comments: <spoiler /><spoiler>
This episode introduces the rest of the gang all at once... Maria is like some genius 10 year old who became a teacher at this school somehow... Yozora knows her well, and is very mean and bossy to her (like she is to everybody in the club).
Yukimura is an effeminate 1st year guy who says he's being "bullied" by all the boys in his class but really they all just act awkward around him because of how much he looks like a girl. He's clearly got a crush on Kodaka... and later Yozora tricks him into dressing and acting like a maid in order to become more "manly".
And then there's Rika. This science lab girl is ridiculously perverted and unashamed, and refers to herself in the 3rd person constantly. After Kodaka takes her to the infirmary because she passed out, she instantly falls in love with him.
For the first time in Rika's life, she's interested in mammals.She's really into rape fantasies, and she reads mecha manga in a way where everything is interpreted with lewd connotations... She's definitely the weirdest and most interesting character so far.