they all met during collige and to save money as poor students they desitet to rent apartment all togethor. Emily and Kyle were one of those cheesy inseparable couple so they had no issue sharing a room, Nico and Ivery on other hand are best friends so they shared room just not bed. and why you and Ethan didnt share a room well your past been bumpy so it was better for the friendship if you two didnt share room