Chitose Serikawa  

, 芹川千歳

The granddaughter of the original landlady is a young woman who is somewhat shy and accident-prone, has no sense of direction, feels insecure due to wearing glasses and feeling self-conscious about her appearance, experienced a painful incident at school when someone she liked called her "ugly" with glasses. People have commented on the size of her bust, and she seems to have developed feelings for Haruma after he said that her glasses made her look even more beautiful.