Episode 1, Shino adjusting Tsuda's tie, and administering punishment for violating school dress code simultaneously.
In one episode, Aria is putting some boxes up on a high shell, causing her breasts to jiggle. Shino and Suzu comment that they look heavy. A moment later, Aria is carrying a heavy box, and Tsuda tells her that he'll carry them for her. Aria immediately misinterprets the object he intended to carry for her as her breasts, and complains that it's sexual harassment.
Uomi: Your hand is really soft, too, President Amakusa.
Shino: I thought I wiped the *censored* juice off, though.
The second season version ends with Tsuda confronting everyone he spoke to that day, attempting to weed out the person who framed him by checking their alibis. Suzu and Kotomi are nervous wrecks, Aria claims she was busy in the bathroom due to an enema but did get out the sex toy, Shino plays it cool while casually mentioning that she has a D-Cup, and after all that, Hata outright admits it was her, laughing all the way through the closing title card.