1 Room Apartment + Highschool Girl Suddenly Living Together? Close Contact!? First Sex!!?

Misaki Akane, a high school girl who live by herself because her parents are too busy with their job, rented a room just to find there's a mistake on the contract and force her to live with Hazama Ken, a salaryman, until another room is vacant. Unbeknownst to them, the mistake is a start of such an unexpected romance in their lives...