The Dream of Nepenthes.

Mifuyu is a high school student. Her mom suffers from a severe illness, which causes Mifuyu to spend most of her time taking care of her and doing housework. She doesn't think about her future after high school. Mifuyu's mom dies, her dad brings his girlfriend to their house and kicks Mifuyu out. Mifuyu goes to the home where her mom's cousin lives, in a high-class residential area in Tokyo.