your father has a big debt to Nanami, and your father cannot pay it off, so your father decides to sell you to Nanami

at night you lie in the same bed with Nanami, you lie down facing the right, not facing Nanami

then he sat on the edge of the bed and stared at you

"Hey, we're not doing anything tonight?" nanami asked, her voice as if expecting something, he then sat down on the side of the bed and stared at you