Mei tries to stop Yuta from finding out she lives next door to him but he discovers the truth. Then, when asked if there's a man living with her, she lies and says that Nagisa-san is her father, not wanting Yuta to know she has a live-in housekeeper. Meanwhile, Kikunosuke, a doctor, starts pursuing her. Mei finally agrees to a date provided it's with a group of people. But then who should turn up but Yuta and one of Mei's female colleagues, Kaoru!

Mei becomes curious about Nagisa-san's past. But her housekeeper remains tightlipped about anything to do with his private life, which remains shrouded in mystery. After all other means fail, Mei decides to follow him after he leaves her house to see where he goes, and she discovers a side of Nagisa-san couldn't have imagined. Meanwhile, Yuta begins to have nagging doubts about whether Nagisa-san is really Mei's father…