Ep. 6: The Student Council President's Family

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Picking up from episode 5's kiss, Ui and Hayato receive a surprise visit from Ui's mother Misato (who looks more like Ui's little sister to Hayato's shock). Misato visits Hayato's apartment for dinner, and then shares an awkward bath with him. Ui later gives Hayato a back massage which leads to tickling and more until Misato interrupts. (Source: Wikipedia)