Horoshi und Umataro geraten in einen Streit. Keiner möchte sich beim anderen entschuldigen. Motoko versucht die beiden daran zu erinnern, warum sie Forschungspartner geworden sind.
At Tsutsumi residence Motoko tells Moriya about lab 7’s accomplishments to which he reminds her not to get involved still she remains adamant about making Hiroshi fall for her to which Moriya hints what if Hiroshi were to disappear next day she visits lab 7 where Hiroshi and Ummataro are fighting over A106’s state stranded Hiroshi takes off out of anger, crying and again bumps into Moriya who appraises him on his research paper and offers him to join lab 7.
どうすればお茶の水にアプローチできるか思案中の茂斗子。そんな時、第7研究室（ナナケン）からお茶の水が飛び出してくる。Ａ106の修理を巡って天馬とケンカをしたのだ。天馬に腹を立てているお茶の水に第1研究室の茂理也が近づき、お茶の水をイチケンへと誘う。そんな状況を見ていた茂斗子は、お茶の水に「どうして天馬と一緒に研究をしているの？」と尋ねる。そこで、お茶の水は天馬との出会いを語り始めた……。
Un litigio tra Umataro e Hiroshi mette a rischio il destino del laboratorio 7. Per salvare il laboratorio, Motoko e Ran minacciano di divulgare un pericoloso segreto.
