|Japanese Title||ふう……あまり驚かせるなよ ただの妹じゃないか|
|Romanized Title||Fū…… amari odoroka seru na yo Tada no imōto janai ka|
|English Title||Whoa.... Don't startle me too much, You're just a little sister!|
|Airdate||May 11, 2014|
|Opening||Cupidu Review by Aoi Yuuki|
|Ending||Kanojo ga Flag wo Tateru Riyuu by YELL|
|Previous Episode||Episode 5|
|Next Episode||Episode 7|
The mysterious girl from last episode is accepted into Souta’s school as a new student, and her name is Mei. Apparently, she has the same ability to see flags that Souta has. But that doesn’t matter because
they're going on a school trip! All the students are split into two groups—one group will be going to the ocean while the other goes to the forest/mountains. Souta winds up just spending time at the beach, which he is not too fond of; as every time he touches the water, he gets horrible flashbacks of the ill-fated cruise ship incident which lead to him having “flag reading” powers. However, during the trip, he does meet a young middle school girl named Kurumiko, who sells popsicles near the beach.
By hanging out with her, Souta eventually discovers that she’s lost her parents, and peddles popsicles in order to survive. Souta spies “story progression” flags on Kurumiko, so he continues to hang out with her. Finally, Kurumiko takes Souta to her secret hideout, which is a small cavern connected to the ocean. There she reveals that her parents were part of the crew of the same ship that Souta was on when it sunk. After this revelation, the high tide unexpectedly comes in, leaving Souta and Kurumiko stranded, with the sea water constantly rising.
Kurumiko, depressed, puts up numerous death flags. Fotunately, Souta is able to abolish them all by accepting Kurumiko as a younger sister, and asking her to stay at the Quest Dorms with him and the others. They are rescued by Ruri soon after. However, as the trio make their way back to the temporary dorms, they come face to face with a mysterious girl…