Rin ga Utau, Mirai no Neiro

Your dream is to become a professional composer and you’ve worked hard to realize this dream by yourself. Since you manage by yourself, there’s no reason to rely on anyone else. However, you’re not sure if this is really what you truly want to do. Coming home one day, you find a young girl sleeping in your bed. After managing to wake her up, she requests you to write a song for her… a song only for her. Thus begins your journey together, as partners.

Source: Micchi's blog