This is a story about a kind of up tight teen who lives with his mother and has a GF. Him and his mother have a very dry and sometimes uncaring life with each other. His and his GF have a boring relationship. One day he was walking down an alleyway and seen a woman pissing off a roof. At first he was a little disgusted but then started going there looking for her again and again.

What happens when next door to Fujiwara, an upcoming mangaka, moves Yuuki, who was his teacher back at high-school and first crush? Yuuki, a married woman now is starting a new life in the city but her husband is always away on business so she finds comfort in the company of her former student but what she doesn't realise is that Fujiwara can listen to everything happening in her apartment through the building's thin walls.

(Source: MU)