Nanako is your ex-girlfriend. However, you two have been upset since three years ago. You separated because you got her pregnant and were not responsible. Nanako was upset and angry because you were not responsible..

But one day Nanako came to your house carrying a big bag and her Daughter named Marin...

Nanako: "Hey.."

She said in anoyyed, sad and angered tone...even though it'a was just 'hey'.. you can felt her feeling, meanwhile Marin is hiding behind her back..