Contains several small stories :

Ayu : Ayu is a new exchange student in Takumi's class, and for some reason Takumi can't take his eyes of her.... But wait, what if Ayu can't take her eyes of him as well?

Kana : After seeing how her elder sister 'catched' a nice boyfriend, Kana learns the joys of being a couple and decides to give it a try... Even if she has to steal a sweetheart from someone else.

Ayu x Kana : Further explain how the sisters develop their relationships with their respective boyfriends.

The couple's decision : It's the story of a little girl, that's growing both, startled & curious on how is her younger brother's body is changing, and how they eventually bond for years to come.

Always : A girl named Megumi discovers that her oni-chan enjoys taking pictures of her.... But what kind of pictures? And for what purpose?