Both are from the same manga. Although Kishibe Rohan is a character from the manga, he didn't appear in the movie and is kind of detached from the manga world in the mini drama adaptation.

Male leads in both dramas (Hajime and Kaoru) have a lot of similarities not just in looks. Kahoko has an overprotective mother, Kazumi (Virgin Road) had an overprotective father but both girls are completely different.

Both about an alien or a monster coming to live among humans and start to learn about love and friendship.

Both about women worrying about their relationships and keep making mistakes trying to learn how to accept themselves. Their romantic interests are kind of the same especially the main character who is torn between a younger man who are different from her, has kind of a dark history and a man same age as hers who has the same interests as her and probably her soulmate.

Both revolve around an old case the main character trying desperately to solve, have many flashbacks about the characters when they were kids, corruption within police, tragedy and Hirosue Ryoko.