Nakaimo: My Little Sister is Among Them! Season 1 Episode 9 Surprise Attack! Little Sister Warning!

After the intense situation in the previous episode, Shogo promised to focus on finding his little sister. However, when he wakes up, Mana informs him that their maid Konoe has gone missing. They find a letter from her that leads them to a park, but when they arrive, they are ambushed by a group of men. In the heat of the moment, Konoe suddenly appears and saves them from the attackers.

After regrouping, Konoe explains that the men are members of the Yakumo Group, a leading corporation in the city. They suspect that someone from the group is after Shogo and are using any means necessary to obtain him. However, the group's real motive is still unclear.

With the threat of danger looming over them, they decide to work together to uncover the truth. As they continue their investigations, they discover a shocking secret about the Yakumo Group and its connection to Shogo's family.

Meanwhile, Shogo's relationships with the girls in his life start to evolve. He begins to feel conflicted about his feelings towards Konoe and the other girls, especially after experiencing a heartwarming moment with his childhood friend Yuzurina.

As tensions rise and the danger becomes more apparent, Shogo must navigate his complicated relationships and uncover the truth behind the Yakumo Group's motives before it's too late.