Distant Thunder in Winter Episode 11

As part of their course, each student is about to be paired with a member of the opposing sex for further training. Saki's classmate Ryou is interested on picking her, but when she realizes that he is not who was supposed to be, she turns him down and pairs up with Satoru instead. While talking to their friends, Saki realizes that their memories were altered so they recognize Ryou as a regular member of the group since childhood instead of Shun, whose name they can't manage to remember. Upon seeing Mamoru panicking about the situation, Saki, Satoru and Maria decide to leaving out of the subject and keep investigating by themselves, but soon after they are called for an audience with Satoru's grandmother Tomiko, who is revealed to be the head of the Ethics Committee, a fact that not even Satoru was aware of.