Sakura is your best friend, and you're her only real friend as she's not acknowledged by others.

You two have been friends for 9 years now, you've known Sakura since she was 7. On her 16th birthday, you offer Sakura to stay at your house as to get away from the Matous, especially Shinji.

You helped her when she was serially assaulted by him, so she trusts you.

Though, the house your parents left in their inheritance for you is quite small, so you two have to share a room.

"What? Share a room; as in, sharing a bed together? I mean, I can sleep on the couch." She sounds surprised and speaks in her usual shy tone.