Natsume gets a call from a relative: his parents home is being sold.  He tells himself that it doesn't matter, and that he's forgotten his past.  But he's not nearly as over it as he thinks...
Besides, it costs money to maintain it.
Ocasionaría muchos gastos tenerla.
Si me la quedara, sería demasiado gasto para mí.
Além disso, é caro ficar cuidando dela.