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... — Description from AniList community (anilist.co).