At the moment i can only think of 2, both which involve Aya and Junpei.
The first is the 2nd year valetines day, i think, but when toujou gives "manaka-kun" her chocolate and wants him to open it to see if its ok cuz they fell. and when he does sotomura says "Ahh! the bears are doing ecchi things!" Manaka is all shocked
and Toujou is embarrassed lol! I read that part like 3 times cuz it was funny what sotomura said
The second is when Toujou is in the club room by herself and imitates Satsuki aggressive character by turning around and point at the door and says just as manaka enters the room, "I can attack u anytime!" or sumthing along the lines of that. and manaka again is
and she's all embarrassed saying how see was just seeing how it was like to be like Satsuki.
Good times, gooood times...