Sunako locks herself most of the time in her roof to watch her horror movies and eat a lot of junkfood at the same time. This caused her to have lots of pimples and to gain wait.
The pimples kind of gave me goosebumps. Noi gives her tips, but Sunako already went back to her room. She hardly cares for herself anyway. 
Then Ranmaru’s fiancee arrives. She plans to become a lady/woman/girl that Ranmaru will love. 
This episode is about beauty and Noi and Tamao (Ranmaru’s fiancee) becoming ideal for Takenaga and Ranmaru respectively.Episode 18
The guys used a different tactic this time for turning Sunako into a lady. Their tactic is like a “If you can’t beat them, join them” thing.
They were able to make Sunako wear a gothic dress after they told her that she’s out of place. She was hesitant, but when she wore it she fell in love with the feeling of wearing the dress. She was really into it that when she needed to buy food ingredients, she wore that. She got more attention this time. She didn’t realize that the more she’s trying to be different, the more she will just gain attention. Isn’t that what she hates? :P Sunako got into a trouble when she went with a kid who showed her his hideout. The people thought the kid was kidnapped by her. Kyouhei comes to rescue her once more. He wore a prince outfit, so it would seem they were just having a cosplay or a shooting. They think it was a bit of progress for getting Sunako to wear a dress. It sure was a progress. In the end, she said she didn’t mind wearing a dress once in a while.