Tập 2: Rito thu nhỏ thành chuột và Mea nghi ngờ sự phụ thuộc vào Nemesis trong cuộc tấn công của người ngoài hành tinh

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Rito finds Momo in his bed again. Momo reminds Rito about her harem plan and advises him to be careful of Mea. Meanwhile, Mea is worried that Nemesis is not responding to her as she always relies on her master for directions. She tries to hide her concerns from Nana who is inviting her to a bakery. Elsewhere, Tearju thanks Rito for helping her and asks him if Momo has new information about Mea. Momo is more concerned about Yami skipping classes. Tearju understands Yami's motives about staying away from her and wishes to see her and Mikan, Yami's friend. As Rito thinks about the friendship, Lala bumps into him and accidentally drops an invention. Rito activates it turning him into a mouse. Being small, Rito can easily see girl's underwear, making him uncomfortable. He desperately searches for Lala but his small size makes him vulnerable to being stepped on. He eventually lands under Yami's clothing. Rito manages to escape with her underwear but passes out. Mea finds Rito and remembers Nemesis's words about weak people being weeded out. She helps Rito anyways and Rito recovers in time for a beating from Yami. As Yami leaves, Mea asks Yami about feelings and how Nemesis never taught her this subject. Yami tells Mea to discover it herself. Afterschool, Rito finds Mea on the roof in her battle clothes and asks about her motives. He tries to convince Mea not to rely solely on her master Nemesis but it enrages her. Mea seduces Rito with her Psycho Dive ability but alien enemies also approach and attack Mea, leading Rito and Mea on a wild rampage. During the fight, Mea realizes that Nemesis is reminding her that she is a weapon. Nana also spots Mea in her weapon form. (Source: Wikipedia)