My Sister's Trap (花咲く妹たちImōto no Wana) is the 11th episode of the Kono Naka ni Hitori, Imouto ga Iru! anime series.
Shougo Mikadono dreamed of him saving Konoe Tsuruma from the car accident and then called as "onii-chan" by Yuzurina Houshou, only to be woken up by Yuzurina in mid-dream. He later found out during breakfast that Yuzurina was not the person saying that she would marry Shougo during his father's funeral
Because Miyabi Kannagi was absent from class, Shougo and Konoe visited her. While Konoe was busy preparing the tea, Miyabi demanded Shougo to kiss her but was rejected. Instead, she proposed a date with Shougo, much to his shock.
The same evening, Yuzurina told Shougo that Konoe was at Kumagorou Mikadono's funeral. Shougo did not believe it, because Konoe had already told him that she had to take the entrance exam to Miryuuin that day, but Yuzurina insisted having seen her at the funeral and that she was the one who called him. Yuzurina warned her brother not to let anyone use his trust to trick him.
Miyabi returned to class the next day without any lethargy she had before. Realizing something, Shogo barged into the student council office and asked Rinka for information. Days later, Shogo and Miyabi went out for their date.
Ikusu discovered Yuzurina as an actor in a clip from "Transforming Warrior Granberion", Shougo's favorite show during his childhood. The costume Yuzurina appeared in was also what she wore in Shougo's dream at the start of the episode.